My first 4x4 piston door (it breaks every now and then). 0.75 opening 0.50 closing. 137 blocks

My first 4x4 piston door (it breaks every now and then). 0.75 opening 0.50 closing. 137 blocks
My first 4x4 piston door (it breaks every now and then). 0.75 opening 0.50 closing. 137 blocks
My first 4x4 piston door (it breaks every now and then). 0.75 opening 0.50 closing. 137 blocks

blocks