diff --git a/main.go b/main.go
index c63c33f..70af857 100644
--- a/main.go
+++ b/main.go
@@ -85,29 +85,47 @@ func physics(particleList *[MAXPOINTS]rl.Vector2, particleCount int, particleLis
 	var particleSpeed = [MAXPOINTS]rl.Vector2{{0, -300}} //pixel pro Sekunde
 	var timeIncrement float64 = 0.01
 	var gravity rl.Vector2 = rl.Vector2{0, 300}
+	var newParticleList [MAXPOINTS]rl.Vector2
+	var newParticleSpeed [MAXPOINTS]rl.Vector2
 
 	for j := float64(0); j < 50; {
 		var startTime time.Time = time.Now()
 
-		(*particleListKey).Lock()
+		// Snapshot der aktuellen Positionen für den parallelen Block (read-only)
+		particleListKey.Lock()
+		currentPositions := *particleList
+		particleListKey.Unlock()
 
-		for i := 0; i < particleCount; i++ {
+		var wg sync.WaitGroup
 
-			obstacleReflect((*particleList)[i], &(particleSpeed[i]), obstacles, particleRadius, obstacleCount)
-			particleList[i] =
-				rl.Vector2Add(
-					particleList[i],
+		for k := 0; k < particleCount; k++ {
+			wg.Add(1)
+			go func(i int) {
+				defer wg.Done()
+
+				// Jede Goroutine arbeitet nur auf Index i → kein Datenkonflikt
+				obstacleReflect(currentPositions[i], &particleSpeed[i], obstacles, particleRadius, obstacleCount)
+
+				newParticleList[i] = rl.Vector2Add(
+					currentPositions[i],
 					rl.Vector2Scale(particleSpeed[i], float32(timeIncrement)))
 
-			particleSpeed[i] =
-				rl.Vector2Add(
+				newParticleSpeed[i] = rl.Vector2Add(
 					particleSpeed[i],
 					rl.Vector2Scale(gravity, float32(timeIncrement)))
+			}(k)
 		}
 
-		(*particleListKey).Unlock()
+		wg.Wait()
+
+		// Ergebnisse zurückschreiben — nur dieser Block muss gelockt sein
+		particleListKey.Lock()
+		*particleList = newParticleList
+		particleListKey.Unlock()
 		//fmt.Println(particleList)
 
+		particleSpeed = newParticleSpeed
+
 		j += timeIncrement
 		var endTime time.Time = time.Now()
 		var elapsed time.Duration = endTime.Sub(startTime)