diff --git a/main.go b/main.go
index e6b7463..1964894 100644
--- a/main.go
+++ b/main.go
@@ -105,8 +105,9 @@ func physics(particleList *[MAXPOINTS]rl.Vector2, particleCount int, particleLis
 
 				// Jede Goroutine arbeitet nur auf Index i → kein Datenkonflikt
 				for l := 0; l < particleCount; l++ {
-					if rl.CheckCollisionCircles(currentPositions[i], *particleRadius, currentPositions[l], *particleRadius) && !(l == i) {
-						particleSpeed[i] = rl.Vector2Negate(particleSpeed[i])
+					if rl.CheckCollisionCircles(currentPositions[i], *particleRadius, currentPositions[l], *particleRadius) && (l != i) {
+						var colNormal rl.Vector2 = rl.Vector2Normalize(rl.Vector2Subtract(currentPositions[i], currentPositions[l]))
+						particleSpeed[i] = rl.Vector2Reflect(particleSpeed[i], colNormal)
 					}
 				}