diff --git a/obstacle.go b/obstacle.go
index 529f144..bbb9516 100644
--- a/obstacle.go
+++ b/obstacle.go
@@ -12,10 +12,10 @@ type Obstacle struct {
 func GenerateObstacles(count int, width, height float32) []Obstacle {
 	out := []Obstacle{}
 	for i := 0; i < count; i++ {
-		x := rand.Float32() * width
-		y := rand.Float32() * height
-		w := rand.Float32() * width / 10
-		h := rand.Float32() * height / 10
+		x := rand.Float32() * (width - (width / 10))
+		y := rand.Float32() * (height - (height / 10))
+		w := rand.Float32() * (width / 10)
+		h := rand.Float32() * (height / 10)
 		out = append(
 			out,
 			Obstacle{