diff --git a/main.go b/main.go
index de98607..bcdab61 100644
--- a/main.go
+++ b/main.go
@@ -16,12 +16,6 @@ type magnet struct {
     radius float32
 }
 
-type state struct {
-    windowHeight  int32
-    windowWidth  int32
-    magnetsDistance float32
-}
-
 type ball struct {
     pos rl.Vector2
     originGrid rl.Vector2
@@ -29,11 +23,21 @@ type ball struct {
     speed rl.Vector2
 }
 
+// parametros
+const windowWidth = 800
+const windowHeight = 450
+const magnetRadius = 15 
+const magnetForce = 8
+const magnetsDistance float32 = 80
+const verticalGrids = 100
+const horizontalGrids = 100
+const ballMass float32 = 2
+const gravConst float32 = 8
+const magnetsAngle = 45
+
 
 func (ball *ball) update(magnets []magnet) (bool, rl.Color) {
     magnetsPull := rl.Vector2{}
-    const ballMass float32 = 1
-    const gravConst float32 = 8
 
     for _, magnet := range magnets {
         direction := rl.Vector2Normalize(
@@ -64,55 +68,44 @@ func (ball *ball) update(magnets []magnet) (bool, rl.Color) {
 
 func main() {
 
-    state := state{
-        windowWidth: 800,
-        windowHeight: 450,
-    }
 
 	rl.InitWindow(
-        state.windowWidth, state.windowHeight, 
+        windowWidth, windowHeight, 
         "raylib [core] example - basic window",
     )
 	defer rl.CloseWindow()
 	// rl.SetTargetFPS(60)
 
-    const RADIUS = 10 
-    const FORCE = 8
-
     magnets := []magnet{
         {
             color: rl.Red,
-            radius: RADIUS,
-            force: FORCE,
+            radius: magnetRadius,
+            force: magnetForce,
         },
         {
             color: rl.Green,
-            radius: RADIUS,
-            force: FORCE,
+            radius: magnetRadius,
+            force: magnetForce,
         },
         {
             color: rl.Blue,
-            radius: RADIUS,
-            force: FORCE,
+            radius: magnetRadius,
+            force: magnetForce,
         },
     }
 
     // pocisionar imas no meio da tela
-    xCenter := float32(state.windowWidth / 2)
-    yCenter := float32(state.windowHeight / 2)
-    var magnetsDistance float32 = 80
+    xCenter := float32(windowWidth / 2)
+    yCenter := float32(windowHeight / 2)
     for i := range magnets {
-        angle := 2.0 * math.Pi * float64(i) / float64(len(magnets))
+        angle := 2.0 * math.Pi * float64(i) / float64(len(magnets)) + magnetsAngle
 
         magnets[i].pos = rl.Vector2{
             X: float32(math.Cos(angle)) * magnetsDistance + xCenter,
             Y: float32(math.Sin(angle)) * magnetsDistance + yCenter,
         }
     }
-
     
-    verticalGrids := 60
-    horizontalGrids := 60
 
     grid := make([][]rl.Color, verticalGrids)
     for i := range grid {
@@ -128,8 +121,8 @@ func main() {
     // }
     //
     gridSize := rl.Vector2{
-        X: float32(state.windowWidth / int32(verticalGrids)),
-        Y: float32(state.windowHeight / int32(horizontalGrids)),
+        X: float32(windowWidth / int32(verticalGrids)),
+        Y: float32(windowHeight / int32(horizontalGrids)),
     }
 
     var fallingBall []*ball
@@ -154,7 +147,7 @@ func main() {
         fallingBall = append(fallingBall, &ball{
             pos: rl.Vector2{X: x, Y: y},
             speed: rl.Vector2{},
-            radius: RADIUS/2,
+            radius: magnetRadius/2,
             originGrid: randomGrid,
         })
     }
@@ -173,8 +166,8 @@ func main() {
             }
         }
         for i := range magnets {
-            rl.DrawCircleV(magnets[i].pos, RADIUS+2, rl.Black)
-            rl.DrawCircleV(magnets[i].pos, RADIUS, magnets[i].color)
+            rl.DrawCircleV(magnets[i].pos, magnetRadius+2, rl.Black)
+            rl.DrawCircleV(magnets[i].pos, magnetRadius, magnets[i].color)
         }
 
         if len(fallingBall) == 0 {
@@ -186,11 +179,20 @@ func main() {
         for i := 0; i < len(fallingBall); i++ {
             ball := fallingBall[i]
 
-            rl.DrawCircleV(
-                ball.pos, ball.radius/2+1, rl.Black,
+            // rl.DrawCircleV(
+            //     ball.pos, ball.radius/2+1, rl.Black,
+            // )
+            // rl.DrawCircleV(
+            //     ball.pos, ball.radius/2, 
+            //     rl.NewColor(100, 100, 100, 255),
+            // )
+            rl.DrawRectangleV(
+                rl.Vector2{X: ball.pos.X-1, Y: ball.pos.Y-1 }, 
+                rl.Vector2{X: ball.radius+1, Y: ball.radius+1}, 
+                rl.Black,
             )
-            rl.DrawCircleV(
-                ball.pos, ball.radius/2, 
+            rl.DrawRectangleV(
+                ball.pos, rl.Vector2{X: ball.radius, Y: ball.radius}, 
                 rl.NewColor(100, 100, 100, 255),
             )
             if hit, color := ball.update(magnets); hit {