A beautiful clockwork of the (light signal, L, is commanded from two pushbuttons, B1 and B2, as follows L lights up 2 seconds after the continued operation of B1, L goes out when B2 is pressed for 3 seconds. After a sequence of 3 actuations of L the signaling gets blocked. Simultaneously pressing B1 and B2 unlocks the signaling. design the logically controlled using only a ladder diagram:1.3), by (Jean Delville and Edwin Austin Abbey:0.8), (pop art and sculpture:0.8), (painting:0.3) | Painting