it is done

core/src/mindustry/entities/effect/RubbleDecal.java

@@ -0,0 +1,41 @@
+package mindustry.entities.effect;
+
+import arc.Core;
+import arc.graphics.g2d.Draw;
+import arc.graphics.g2d.TextureRegion;
+import arc.math.Mathf;
+
+import static mindustry.Vars.headless;
+
+public class RubbleDecal extends Decal{
+    private TextureRegion region;
+
+    /** Creates a rubble effect at a position. Provide a block size to use. */
+    public static void create(float x, float y, int size){
+        if(headless) return;
+
+        RubbleDecal decal = new RubbleDecal();
+        decal.region = Core.atlas.find("rubble-" + size + "-" + Mathf.randomSeed(decal.id, 0, 1));
+
+        if(!Core.atlas.isFound(decal.region)){
+            return;
+        }
+
+        decal.set(x, y);
+        decal.add();
+    }
+
+    @Override
+    public float lifetime(){
+        return 8200f;
+    }
+
+    @Override
+    public void drawDecal(){
+        if(!Core.atlas.isFound(region)){
+            remove();
+            return;
+        }
+        Draw.rect(region, x, y, Mathf.randomSeed(id, 0, 4) * 90);
+    }
+}