Trapdoor spider

A small spider that is 1 block big and a half slab high. It will run to the nearest sand block and dig under it, if you break the block it was hiding in it will come out and attack you like a silver fish. When it is hiding under a block and you walk neer it, it will slow you down and give you 3 second's of poison. If you drop a item neer them they will grab the item and then hide again. When you kill then they drop string and the item they took. There texture is like the sandstone texture but darker and they have orange eyes.