diff --git a/src/main.zig b/src/main.zig
index 1e78b89..c93af23 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,6 +1,21 @@
 const std = @import("std");
 const rl = @import("raylib");
 const rg = @import("raygui");
+const pr = @import("primitives.zig");
+
+const Particle = struct{
+    const Self = @This();
+    position : pr.Vec = .{.a = .{.x=0,.y=0,.z=0}},
+    velocity : pr.Vec = .{.a = .{.x=0,.y=0,.z=0}},
+    acceleration : pr.Vec = .{.a = .{.x=0,.y=0,.z=0}},
+    pub fn new(self:Self)void{
+        _ = self;
+    }
+    pub fn update(self:Self)void{
+        self.velocity = self.velocity + self.acceleration;
+        self.position = self.position + self.velocity;
+    }
+};
 
 pub fn main() anyerror!void {
     // Initialization
@@ -10,25 +25,26 @@ pub fn main() anyerror!void {
     const rect2 = rl.Rectangle{ .x = @as(f32, @floatFromInt(10)), .y = @as(f32, @floatFromInt(10)), .width = @as(f32, @floatFromInt(300)), .height = @as(f32, @floatFromInt(100)) };
     var msg_res : i32=-1;
     var state : i32=-1;
+
+    const p1 = Particle{.velocity = .{.a = .{.x = 1,.y = 1}}};
+
     rl.initWindow(screenWidth, screenHeight, "raylib-zig [core] example - basic window");
     defer rl.closeWindow(); // Close window and OpenGL context
 
     rl.setTargetFPS(60); // Set our game to run at 60 frames-per-second
-    //--------------------------------------------------------------------------------------
 
-    // Main game loop
     while (!rl.windowShouldClose()) { // Detect window close button or ESC key
-        // Update
-        //----------------------------------------------------------------------------------
-        // TODO: Update your variables here
-        //----------------------------------------------------------------------------------
+        rl.beginDrawing();
+        defer rl.endDrawing();
 
-        // Draw
-        //----------------------------------------------------------------------------------
-        rl.clearBackground(rl.getColor(rg.guiGetStyle(rl.DEFAULT,rl.BACKGROUND_COLOR)));
+        rl.clearBackground(rl.Color{.r=181,
+                                    .g =177,
+                                    .b =154,
+                                    .a = 255,
+        });
 
         if(state != 0){ 
-            msg_res = rg.guiMessageBox(rect2, "Title", "question?", "Nice;Cool;dsf;asd");
+            msg_res = rg.guiMessageBox(rect2, "Title", "question?", "Nice;Cool");
             if(msg_res > -1){
                 state = msg_res;
             }
@@ -43,11 +59,10 @@ pub fn main() anyerror!void {
                     else =>{},
             }
         }
+        p1.update();
+        rl.drawCircle(p1.position.a.x,p1.position.a.y,40,rl.Color{.r=124,.g=195,.b=217,.a=100});
 
-        rl.beginDrawing();
-        defer rl.endDrawing();
 
-        //----------------------------------------------------------------------------------
     }
 }
 
diff --git a/zig-out/bin/raylib-test b/zig-out/bin/raylib-test
index 76795f7..d8e65b0 100755
Binary files a/zig-out/bin/raylib-test and b/zig-out/bin/raylib-test differ