Spawning Things back thru a button

Im making a phys map and i want to respawn the blocks that where destroyed thru the use of a button, How would i go around doing that?




Another question, What do i put in to remove the blocks? before they respawn?

Name all of the phys objects the same name. Then hit a new output, and for entity do the phys object names, and hit kill. Then put the spawn output about .01 seconds after.