Dwa kody, pierwszy na usunięcie od razu z całego obszaru:
function doRemoveItemsFromArea(leftTopCorner, rightBottomCorner, itemId)
for px = leftTopCorner.x, rightBottomCorner.x do
for py = leftTopCorner.y, rightBottomCorner.y do
for pz = leftTopCorner.z, rightBottomCorner.z do...