diff --git a/gl b/gl
new file mode 100644
index 0000000..e69de29
diff --git a/roms/IBM Logo.ch8 b/roms/IBM Logo.ch8
new file mode 100644
index 0000000..113338e
Binary files /dev/null and b/roms/IBM Logo.ch8 differ
diff --git a/roms/test_opcode.8o b/roms/test_opcode.8o
new file mode 100644
index 0000000..6756767
--- /dev/null
+++ b/roms/test_opcode.8o
@@ -0,0 +1,205 @@
+:alias x0 v8
+:alias x1 v9
+:alias x2 vA
+:alias y	vB
+: imageok
+	0xEA 0xAC 0xAA 0xEA
+: imagefalse
+	0xCE 0xAA 0xAA 0xAE
+: im0
+	0xE0 0xA0 0xA0 0xE0
+: im1
+	0xC0 0x40 0x40 0xE0 
+: im2
+	0xE0 0x20 0xC0 0xE0
+: im3
+	0xE0 0x60 0x20 0xE0
+: im4
+	0xA0 0xE0 0x20 0x20
+: im5
+	0x60 0x40 0x20 0x40
+: im6
+	0xE0 0x80 0xE0 0xE0
+: im7
+	0xE0 0x20 0x20 0x20
+: im8
+	0xE0 0xE0 0xA0 0xE0
+: im9
+	0xE0 0xE0 0x20 0xE0
+: imA
+	0x40 0xA0 0xE0 0xA0
+: imE
+	0xE0 0xC0 0x80 0xE0
+: imF
+	0xE0 0x80 0xC0 0x80
+: imX
+	0xA0 0x40 0xA0 0xA0
+  
+:macro drawop A B {
+i := A
+sprite x0 y 4
+i := B
+sprite x1 y 4
+}
+
+: testAX
+#test Ax
+i := imageok
+sprite x2 y 4
+return
+
+: test1x
+i := imageok
+sprite x2 y 4
+jump endtest
+
+: main
+x0 := 1
+x1 := 5
+x2 := 10
+y := 1
+v5 := 42
+v6 := 43
+#test 3x
+drawop im3 imX
+i := imageok
+if v6 != 43 then i := imagefalse
+sprite x2 y 4
+#test 4x
+y := 6
+drawop im4 imX
+i := imagefalse
+if v5 == 42 then i := imageok
+sprite x2 y 4
+#test 5x
+y := 11
+drawop im5 imX
+i := imagefalse
+if v5 != v6 then i := imageok
+sprite x2 y 4
+#test 7x
+y := 16
+drawop im7 imX
+i := imagefalse
+v6 += 255
+if v6 == 42 then i := imageok
+sprite x2 y 4
+#test 9x
+y := 21
+drawop im9 imX
+i := imagefalse
+if v5 == v6 then i := imageok
+sprite x2 y 4
+#test AX
+y := 26
+drawop imA imX
+testAX
+#test 0E
+x0 := 23
+x1 := 27
+x2 := 32
+y := 1
+drawop im0 imE
+i := imageok
+sprite x2 y 4
+#test 8xy0
+y := 6
+drawop im8 im0
+i := imagefalse
+v7 := v5
+if v7 == 42 then i := imageok
+sprite x2 y 4
+#test 8xy1
+y := 11
+drawop im8 im1
+i := imagefalse
+v7 := 42
+v7 |= y
+if v7 == 43 then i := imageok
+sprite x2 y 4
+#test 8xy2
+y := 16
+drawop im8 im2
+i := imagefalse
+v6 := 120
+v7 := 31
+v7 &= v6
+if v7 == 24 then i := imageok
+sprite x2 y 4
+#test 8xy3
+y := 21
+drawop im8 im3
+i := imagefalse
+v6 := 120
+v7 := 31
+v7 ^= v6
+if v7 == 103 then i := imageok
+sprite x2 y 4
+#test 8xy4
+y := 26
+drawop im8 im4
+i := imagefalse
+v6 := 140
+v7 := 140
+v7 += v6
+if v7 == 24 then i := imageok
+sprite x2 y 4
+#test 8xy5
+x0 := 44
+x1 := 48
+x2 := 52
+y  := 1
+drawop im8 im5
+i := imagefalse
+v6 := 140
+v7 := 120
+v7 -= v6
+if v7 == 236 then i := imageok
+sprite x2 y 4
+#test 8xy6
+y := 6
+drawop im8 im6
+i := imagefalse
+v6 := 224
+v6 <<= v6
+if v6 == 192 then i := imageok
+sprite x2 y 4
+#test 8xyE
+y := 11
+drawop im8 imE
+i := imagefalse
+v6 := 15
+v6 >>= v6
+if v6 == 7 then i := imageok
+sprite x2 y 4
+#test Fx55,Fx65
+y := 16
+drawop imF im5
+i := 1000
+v0 := 0
+v1 := 48
+save v1
+i := 1001
+load v0
+i := imagefalse
+if v0 == 48 then i := imageok
+sprite x2 y 4
+#test Fx33
+y := 21
+drawop imF im3
+i := 1000
+v6 := 137
+bcd v6
+load v2
+i := imageok
+if v0 != 1 then i := imagefalse
+if v1 != 3 then i := imagefalse
+if v2 != 7 then i := imagefalse
+sprite x2 y 4
+#test 1x
+y := 26
+drawop im1 imX
+jump test1x
+: endtest
+loop
+again
diff --git a/roms/test_opcode.ch8 b/roms/test_opcode.ch8
new file mode 100644
index 0000000..f540f69
Binary files /dev/null and b/roms/test_opcode.ch8 differ
diff --git a/sgl b/sgl
new file mode 100644
index 0000000..e69de29
diff --git a/src/chip8.v b/src/chip8.v
index ff3868e..8260d58 100644
--- a/src/chip8.v
+++ b/src/chip8.v
@@ -3,29 +3,30 @@
 import rand
 
 const font := [
-	[0xF0, 0x90, 0x90, 0x90, 0xF0],  // 0
-	[0x20, 0x60, 0x20, 0x20, 0x70], //  1
-	[0xF0, 0x10, 0xF0, 0x80, 0xF0], //  2
-	[0xF0, 0x10, 0xF0, 0x10, 0xF0], //  3
-	[0x90, 0x90, 0xF0, 0x10, 0x10], //  4
-	[0xF0, 0x80, 0xF0, 0x10, 0xF0], //  5
-	[0xF0, 0x80, 0xF0, 0x90, 0xF0], //  6
-	[0xF0, 0x10, 0x20, 0x40, 0x40], //  7
-	[0xF0, 0x90, 0xF0, 0x90, 0xF0], //  8
-	[0xF0, 0x90, 0xF0, 0x10, 0xF0], //  9
-	[0xF0, 0x90, 0xF0, 0x90, 0x90], //  A
-	[0xE0, 0x90, 0xE0, 0x90, 0xE0], //  B
-	[0xF0, 0x80, 0x80, 0x80, 0xF0], //  C
-	[0xE0, 0x90, 0x90, 0x90, 0xE0], //  D
-	[0xF0, 0x80, 0xF0, 0x80, 0xF0], //  E 
-	[0xF0, 0x80, 0xF0, 0x80, 0x80],	//	F
+	[u8(0xF0), u8(0x90), u8(0x90), u8(0x90), u8(0xF0)],  // 0
+	[u8(0x20), u8(0x60), u8(0x20), u8(0x20), u8(0x70)], //  1
+	[u8(0xF0), u8(0x10), u8(0xF0), u8(0x80), u8(0xF0)], //  2
+	[u8(0xF0), u8(0x10), u8(0xF0), u8(0x10), u8(0xF0)], //  3
+	[u8(0x90), u8(0x90), u8(0xF0), u8(0x10), u8(0x10)], //  4
+	[u8(0xF0), u8(0x80), u8(0xF0), u8(0x10), u8(0xF0)], //  5
+	[u8(0xF0), u8(0x80), u8(0xF0), u8(0x90), u8(0xF0)], //  6
+	[u8(0xF0), u8(0x10), u8(0x20), u8(0x40), u8(0x40)], //  7
+	[u8(0xF0), u8(0x90), u8(0xF0), u8(0x90), u8(0xF0)], //  8
+	[u8(0xF0), u8(0x90), u8(0xF0), u8(0x10), u8(0xF0)], //  9
+	[u8(0xF0), u8(0x90), u8(0xF0), u8(0x90), u8(0x90)], //  A
+	[u8(0xE0), u8(0x90), u8(0xE0), u8(0x90), u8(0xE0)], //  B
+	[u8(0xF0), u8(0x80), u8(0x80), u8(0x80), u8(0xF0)], //  C
+	[u8(0xE0), u8(0x90), u8(0x90), u8(0x90), u8(0xE0)], //  D
+	[u8(0xF0), u8(0x80), u8(0xF0), u8(0x80), u8(0xF0)], //  E 
+	[u8(0xF0), u8(0x80), u8(0xF0), u8(0x80), u8(0x80)],	//	F
 ]
 
 struct Screen{
-	pub mut:	
+	pub:	
 		display_width    int = 64	
 		display_height   int = 32	
-		display [64][32]u8
+	mut:	
+		display [32][64]u8
 }
 
 const mem_size         = 4096
@@ -37,44 +38,52 @@ struct Chip8{
 		ram  [mem_size]u8
 		v [num_of_registers]u8
 		screen Screen
-		pc u16
+		pc u16 = 0x200
 		i  int
 		stack Stack
 		delay_timer u8
 }
 
 fn (mut chip Chip8) start_cpu(){
-	
+
+	chip.screen = Screen{}
+
+	mut index := 0
 	// load font in the memory
 	for sprite in font {
-		for byte_sprite in sprite {
-			chip.set_ram(u8(byte_sprite))
-		}
+		chip.set_ram(sprite, index)
 	}
 }
 
 fn (mut chip Chip8) run(){
-	instruction := chip.fetch()
-	chip.decode_and_run(instruction)
+	
+	for{
+		mut instruction := chip.fetch()
+		println(instruction)
+		chip.decode_and_run(instruction)
+	}
 }
 
-fn (mut chip Chip8) set_ram(instruction u8) {
-	chip.ram[chip.pc] = instruction
+
+fn (mut chip Chip8) set_ram(instructions []u8, index int) {
+	
+	mut j := index
+	for i := 0; i < instructions.len; i++ {
+		chip.ram[j] = instructions[i]
+		j++
+	}	
 }
 
-fn (chip Chip8) get_instruction() u8{
-	instruction := chip.ram[chip.pc]
-	return instruction
-}
-
-fn (chip Chip8) fetch() u16{
+fn (mut chip Chip8) fetch() u16{
 
 	mut instruction := u16(0x00)
-	mut half_instruction := chip.get_instruction()
 	
+	mut half_instruction := chip.ram[chip.pc]
+
 	instruction = instruction | half_instruction
 	instruction = instruction << 8
-	half_instruction = chip.get_instruction()
+	half_instruction = chip.ram[chip.pc + 1]
+	
 	instruction = instruction | half_instruction
 
 	return instruction
@@ -86,6 +95,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
    
 	mut opcode_msb := instruction & 0xF000
 	mut opcode_lsb := instruction & 0x00FF
+	mut is_jump := false
 
 	match opcode_msb{
 
@@ -99,8 +109,8 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 
 				0x00E0 {
 					
-					for i in 0..chip.screen.display_width {
-						for j in 0..chip.screen.display_height {
+					for i := 0; i < chip.screen.display_height; i++{
+						for j := 0; j < chip.screen.display_width; j++ {
 							chip.screen.display[i][j] = 0
 						}
 					}
@@ -116,6 +126,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 		0x1000 {
 			nnn = instruction & 0x0FFF
 			chip.pc = u8(nnn)
+			is_jump = true
 			// Jumps to address NNN
 		}
 
@@ -125,6 +136,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 
 			chip.stack.push(chip.pc)
 			chip.pc = u16(nnn)
+			is_jump = true
 			// Calls subroutine at NNN
 		}
 
@@ -153,7 +165,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 		}
 
 		0x6000 {
-			x  = instruction & 0xF00
+			x  = (instruction & 0xF00) >> 8
 			nn = instruction & 0x00FF
 
 			chip.v[x] = u8(nn)
@@ -161,7 +173,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 		}
 
 		0x7000 {
-			x  = instruction & 0xF00
+			x  = (instruction & 0xF00) >> 8
 			nn = instruction & 0x00FF
 
 			chip.v[x] += u8(nn)
@@ -273,6 +285,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 			nnn = instruction & 0x0FFF
 
 			chip.pc = u16(nnn + chip.v[0])
+			is_jump = true
 		}
 
 		0xC000 {
@@ -289,23 +302,33 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 			y = (instruction & 0x00F0) >> 4
 			n = (instruction & 0x000F)
 
+			mut regvy := u8(chip.v[y] % chip.screen.display_height)
+			mut regvx := u8(chip.v[x] % chip.screen.display_width)
+
 			chip.v[f] = 0
 
 			for y_coord := 0; y_coord < n; y_coord++ {
-
-				regvy := chip.v[y + y_coord] & chip.screen.display_height-1
-
+				
+				
+				regn := chip.ram[chip.i + y_coord]
+				
 				for x_coord := 0; x_coord < 8; x_coord++ {
 					
-					regvx := chip.v[x + x_coord] & chip.screen.display_width-1
+					if (regvx + x_coord) < chip.screen.display_width && (regvy + y_coord) < chip.screen.display_height {
+				
+						if regn & (0x80 >> x_coord) == 1 && chip.screen.display[regvy + y_coord][regvx + x_coord] == 1 {
+							chip.v[f] = 1
+							chip.screen.display[regvy + y_coord][regvx + x_coord] = 0
+						}
 
-					if chip.screen.display[regvx + y_coord][regvy + x_coord] == 1 {
-						chip.v[f] = 1
-						chip.screen.display[regvx + y_coord][regvy + x_coord] = 0
+
+						chip.screen.display[regvy + y_coord][regvx + x_coord] = chip.ram[chip.i + y_coord]
+
+						regvx = u8(chip.v[x + x_coord] % chip.screen.display_width)
 					}
-
-					chip.screen.display[regvx + y_coord][regvy + x_coord] = chip.ram[chip.i + y_coord]
 				}
+				
+				regvy = u8(chip.v[y + y_coord] % chip.screen.display_height)
 			}
 		}
 
@@ -372,6 +395,6 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 			panic('Invalid instruction!')
 		}
 	}
-
+	if !is_jump { chip.pc += 2 }
 }
 
diff --git a/src/main.v b/src/main.v
index c8b84db..fa92195 100644
--- a/src/main.v
+++ b/src/main.v
@@ -12,11 +12,10 @@ struct Emulator{
 		is_graphic bool = is_graphic()
 }
 
-fn (emulator Emulator) draw_block(i int, j int, mut ctx gg.Context) {
-	emulator.graphic.draw_rect_filled(f32((j - 1) * 20) + 1, f32((i - 1) * 20), f32(20 - 1), f32(20 - 1), gx.rgb(255,255,255))
+fn (mut emulator Emulator) draw_block(i f32, j f32) {
+	emulator.graphic.draw_rect_filled(f32((j - 1) * 20) + 14, f32((i - 1) * 20), f32(20 - 1), f32(20 - 1), gx.rgb(255,255,255))
 }
 
-
 fn (mut emulator Emulator) load_rom() !{
 
 	arguments := os.args.clone()
@@ -29,9 +28,9 @@ fn (mut emulator Emulator) load_rom() !{
 		println(' Loading ROM in the memory...\n')
 		load_animate()
 		
-		for instruction in file.read_bytes_at(1024, 0) {
-			emulator.chip8.set_ram(u8(instruction))
-		}
+		mut instructions := file.read_bytes_at(1024, 0)
+		mut index := 0x200
+		emulator.chip8.set_ram(instructions, index)
 
 		println('ROM successfully loaded into memory!')
 
@@ -40,29 +39,21 @@ fn (mut emulator Emulator) load_rom() !{
 	}
 }
 
-fn (mut emulator Emulator) draw_screen(){
-	
-	emulator.graphic.begin()
+fn draw_screen(mut emulator Emulator){
 	
 	display_height := emulator.chip8.screen.display_height
 	display_width  := emulator.chip8.screen.display_width
 
-	mut buf := []u8{len: display_height*display_width}
-	mut i := 0
+	for y := 0; y < display_height; y++ {
+		for x := 0; x < display_width; x++ {
 
-	for y := 0; y < emulator.chip8.screen.display_height; y++ {
-		for x := 0; x < emulator.chip8.screen.display_width; x++ {
-			
 			pixel := emulator.chip8.screen.display[y][x]
 
-			buf[i] = u8((0xFFFFFF00 * pixel) | 0x000000FF);
-			i++
+			if pixel == 1 {
+				emulator.draw_block(f32(y*10), f32(x*10))
+			}
 		}
 	}
-
-	emulator.graphic.create_image_from_memory(unsafe{ &buf[0] }, buf.len) or { panic(err) }
-	emulator.graphic.end()
-
 }
 
 fn (mut emulator Emulator) show_display(){
@@ -147,18 +138,14 @@ fn is_graphic() bool{
 	return os.environ()['DISPLAY'] != ''
 }
 
+fn frame(){
+	print('oi')
+}
+
 fn main() {
 
-	mut emulator := Emulator{
-
+	mut emulator := &Emulator{
 		chip8 : Chip8{}
-
-		graphic : gg.new_context(
-						bg_color: gx.rgb(0, 0, 0)
-						width: 1280
-						height: 640
-						window_title: 'V CHIP-8 Emulator'
-					)
 	}
 
 	if emulator.is_graphic {
@@ -166,9 +153,16 @@ fn main() {
 		emulator.load_rom()!
 		emulator.chip8.start_cpu()
 		emulator.chip8.run()
-
-		emulator.draw_screen()
-		emulator.show_display()
+		print('oi')
+		emulator.graphic = gg.new_context(
+								bg_color: gx.rgb(0, 0, 0)
+								width: 1280
+								height: 640
+								window_title: 'V CHIP-8 Emulator'
+								frame_fn : draw_screen
+								user_data: emulator
+							)
+		//emulator.show_display()
 	}else{
 		panic('System is not graphic!')
 	}
diff --git a/src/utils.v b/src/utils.v
index 70077fb..e050abe 100644
--- a/src/utils.v
+++ b/src/utils.v
@@ -33,7 +33,7 @@ fn load_animate() {
 
     mut bars := ['|','/','-','\\']
     
-    for i := 0; i < 4000; i++ {
+    for i := 0; i < 2000; i++ {
             print('[${bars[i%4]}]\r ')
             time.sleep(400000)
     }