diff --git a/animationMario.go b/animationMario.go
index 18cc1a1..9242f74 100644
--- a/animationMario.go
+++ b/animationMario.go
@@ -68,6 +68,14 @@ func (a *Animation) updateMarioPosition() {
 	marioX += centerX
 	marioY += centerY
 
+	// Check for edge collision and change direction if necessary
+	if marioX < 0 || marioX >= a.ctx.Width() {
+		a.mario.angle = -a.mario.angle
+	}
+	if marioY < 0 || marioY >= a.ctx.Height() {
+		a.mario.angle = math.Pi + (math.Pi - a.mario.angle)
+	}
+
 	a.mario.position.X = marioX
 	a.mario.position.Y = marioY
 
@@ -77,16 +85,15 @@ func (a *Animation) updateMarioPosition() {
 		a.mario.angle -= 2 * math.Pi
 	}
 
-	// Direction logic
+	// Direction logic for up and down movement
 	if math.Sin(t) > 0 {
 		a.mario.dir.X = -1 // Moving left
 	} else {
 		a.mario.dir.X = 1 // Moving right
 	}
-
 	if math.Cos(t) > 0 {
-		a.mario.updown = "marioUp" // Moving downward
+		a.mario.updown = "marioDown" // Moving downward
 	} else {
-		a.mario.updown = "marioDown" // Moving upward
+		a.mario.updown = "marioUp" // Moving upward
 	}
 }
diff --git a/board.go b/board.go
index 48cc7c8..7a46b29 100644
--- a/board.go
+++ b/board.go
@@ -40,8 +40,8 @@ func animate(sz image.Point, mqMessages chan mqtt.Message) *Animation {
 			images: initialMap(),
 			updown: "marioUp",
 			dir:    image.Point{1, 1},
-			a:      32,
-			b:      24,
+			a:      30,
+			b:      15,
 		},
 	}
 }