A school girl is waiting for her school bus to get to her school. The time has already past half an hour than the usual arriving time. She have no idea why the bus has not come already. There was a road patchwork going on in the nearby street where the bus was waiting since there was some part missing in the road patching machine. Find that missing part and fix it in that machine to get the bus reach the girl so she reach the school on time. Good luck...