diff --git a/12_union/main.v b/12_union/main.v
new file mode 100644
index 0000000..3006bc3
--- /dev/null
+++ b/12_union/main.v
@@ -0,0 +1,41 @@
+struct Rgba32_Component{
+	r u8
+	g u8
+	b u8
+	a u8
+}
+
+union Rgba32{
+	Rgba32_Component
+	mut:
+		value u32
+}
+
+pub fn main(){
+	
+	clr1 := Rgba32{
+		value: 0x008811FF
+	}
+
+	clr2 := Rgba32{
+		Rgba32_Component: Rgba32_Component{
+			a: 128
+		}
+	}
+
+	white := Rgba32{
+		Rgba32_Component : Rgba32_Component{
+			r: 255
+			g: 255
+			b: 255
+		}
+	}
+
+	sz := sizeof(Rgba32)
+
+	unsafe{ 
+		println('Size: ${sz}B,clr1.b: ${clr1.b},clr2.b: ${clr2.b}')
+		white.value = 0xFFFFF
+		println("RED ${white.r} | GREEN ${white.g} | BLUE ${white.b} | VALUE ${white.value}")
+	}
+}
\ No newline at end of file