Fix bugs in cli

example/src/main.nub

@@ -1,34 +1,49 @@
+// c
 extern func puts(text: cstring)
 
-interface Test
+// raylib
+extern func InitWindow(width: i32, height: i32, title: cstring)
+extern func CloseWindow()
+extern func WindowShouldClose(): bool
+extern func BeginDrawing()
+extern func EndDrawing()
+extern func ClearBackground(color: Color)
+extern func DrawCircle(centerX: i32, centerY: i32, radius: f32, color: Color)
+
+struct Color
 {
-    func print()
-    func test()
+    r: u8
+    g: u8
+    b: u8
+    a: u8
 }
 
-struct Human : Test
+struct Vector2
 {
-    name: cstring
+    x: f32
+    y: f32
+}
 
-    func print()
-    {
-        puts(this.name)
-    }
-
-    func test()
-    {
-        puts("test")
-    }
+struct Vector3
+{
+    x: f32
+    y: f32
+    z: f32
 }
 
 func main(args: []cstring): i64
 {
-    let human: Human = struct {
-        name = "oliver"
+    InitWindow(800, 600, "Hello from nub!")
+
+    while !WindowShouldClose()
+    {
+        BeginDrawing()
+            ClearBackground(struct { r = 55 g = 55 b = 55 a = 255 })
+            DrawCircle(400, 300, 50, struct { r = 255 g = 255 b = 0 a = 0 })
+        EndDrawing()
     }
 
-    human.print()
-    human.test()
+    CloseWindow()
 
     return 0
 }