diff --git a/07_collections/map.v b/07_collections/map.v
new file mode 100644
index 0000000..8b0a10f
--- /dev/null
+++ b/07_collections/map.v
@@ -0,0 +1,79 @@
+pub fn main()
+{
+	
+	mut m := map[string]int{}
+
+	m['one'] = 1
+	m['two'] = 2
+
+	println(m['one'])
+	println(m['two'])
+	println(m['bad_key'])
+	println('bad_key' in m)
+	println(m.keys())
+
+	m.delete('two')
+
+	numbers := {
+		'one' : 1
+		'two' : 2
+	}
+
+	println(numbers)
+
+	// ====================================================== //
+
+	sm := {
+		'abc' : 'xyz'
+	}	
+
+	val := sm['bad_key']
+	println(val)
+
+	intm := {
+		1: 1234
+		2: 5678
+	}
+
+	s := intm[3]
+	println(s)
+
+	// ====================================================== //
+
+	mm := map[string]int{}
+	val3 := mm['bad_key'] or { panic('key not found') }
+	println(val3)
+	m1 := {
+		'abc' : 'def'
+	}
+
+	if v := m1['abc']{
+		println('the map value for that key is ${v}')
+	}
+
+	// ====================================================== //
+
+	arr := [1,2,3]
+	large_index := 999
+	val6 := arr[large_index] or { panic('out of bounds') }
+	println(val6)
+
+	val2 := arr[333]!
+	println(val2)
+
+	// ====================================================== //
+
+	mut m2 := map[string]map[string]int{}
+
+	m2['greet'] = {
+		'Hello' : 1
+	}
+
+	m2['place'] = {
+		'World' : 2
+	}
+
+	m2['code']['orange'] = 123
+	println(m2)
+
+}
\ No newline at end of file
diff --git a/08_module_imports/aliasing_import.v b/08_module_imports/aliasing_import.v
new file mode 100644
index 0000000..457e9fe
--- /dev/null
+++ b/08_module_imports/aliasing_import.v
@@ -0,0 +1,5 @@
+import crypto.sha256 as v_sha256
+
+pub fn main(){
+	println('oi')	
+}
\ No newline at end of file
diff --git a/08_module_imports/basic_import.v b/08_module_imports/basic_import.v
new file mode 100644
index 0000000..648ebb3
--- /dev/null
+++ b/08_module_imports/basic_import.v
@@ -0,0 +1,6 @@
+import os
+
+pub fn main(){
+	name := os.input('Type your name')
+	println(name)
+}
\ No newline at end of file
diff --git a/08_module_imports/selective_import.v b/08_module_imports/selective_import.v
new file mode 100644
index 0000000..16929a6
--- /dev/null
+++ b/08_module_imports/selective_import.v
@@ -0,0 +1,9 @@
+import os { input, user_os }
+
+pub fn main(){
+	name := input('Type yout name')
+	println('Nane ${name}')
+	current_os := user_os()
+	println('Your OS is ${current_os}')
+	
+}
\ No newline at end of file
diff --git a/09_defer/log.txt b/09_defer/log.txt
new file mode 100644
index 0000000..39d7707
--- /dev/null
+++ b/09_defer/log.txt
@@ -0,0 +1 @@
+This is a log file
diff --git a/09_defer/main.v b/09_defer/main.v
new file mode 100644
index 0000000..d48cb5d
--- /dev/null
+++ b/09_defer/main.v
@@ -0,0 +1,16 @@
+import os
+
+pub fn main(){
+	
+	ok := false
+	mut f := os.open('log.txt') or { panic('File cannot be read!') }
+	defer{
+		f.close()
+	}
+
+	if !ok{
+		return
+	}
+
+
+}
\ No newline at end of file
diff --git a/09_defer/state.v b/09_defer/state.v
new file mode 100644
index 0000000..6eab58b
--- /dev/null
+++ b/09_defer/state.v
@@ -0,0 +1,41 @@
+import os { create }
+
+enum State{
+	normal
+	write_log
+	return_error
+}
+
+fn write_log(state State) !int {
+	mut f := create('log.txt')!
+	
+	defer { 
+		f.close() 
+		println('File closed')
+	}
+
+	match state{
+		.normal{
+			return f.writeln("This is a normal file")
+		}
+
+		.write_log {
+			return f.writeln("This is a log file")
+		}
+
+		.return_error{
+			return error('nothing written; file open: ${f.is_opened}')
+		}
+	} 
+	return 0
+}
+
+pub fn main(){
+	n := write_log(.write_log) or { 
+		println('Error ${err}') 
+		0
+	}
+
+	println('${n} bytes written')
+
+}
\ No newline at end of file