diff --git a/src/main/java/de/fanta/challenges/challenges/BedrockWallChallenge.java b/src/main/java/de/fanta/challenges/challenges/BedrockWallChallenge.java
index 87c9509..970003b 100644
--- a/src/main/java/de/fanta/challenges/challenges/BedrockWallChallenge.java
+++ b/src/main/java/de/fanta/challenges/challenges/BedrockWallChallenge.java
@@ -30,14 +30,11 @@
     private void setWall(Location loc) {
         Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, () -> {
             World world = loc.getWorld();
-            int height = world.getMaxHeight() - world.getMinHeight();
-            for (int y = 0; y < height; y++) {
-                for (int x = 0; x < 1; x++) {
-                    Block block = loc.clone().add(x, y, 0).getBlock();
-                    if (!block.isSolid()) {
-                        block.setType(Material.BEDROCK);
-                    }
-                }
+            int maxHeight = world.getMaxHeight();
+            int minHeight = world.getMinHeight();
+            for (int y = minHeight; y < maxHeight; y++) {
+                Block block = loc.clone().add(loc.getX(), y, loc.getZ()).getBlock();
+                block.setType(Material.BEDROCK);
             }
         }, 20 * 10L);
     }