for(int i = 0; dirt != null && i < dirt.length; i++) {
if (dirt[i] == null) continue;
int x = dirt[i][0], y = dirt[i][1], w = dirt[i][2], h = dirt[i][3];
for(int i = 0; dirt != null && i < dirt.length; i++) {
if (dirt[i] == null) continue;
int x = dirt[i][0], y = dirt[i][1], w = dirt[i][2], h = dirt[i][3];