Actually, if it only needs to count 1,2,3,4 it has only four total states, so it only needs to be a 2bit counter. 2Λ2=4....And I really only need it to count from 1-4 so 3 or 4 bit would work.
Not without adding an inverter between the nand gate and the gate of the FET. The nand gate produces a low at its output. The FET gate needs to be high to turn on the lamp.Can I leave the four NAND gates and just sink it to four irf7201 that way I can leave 4L?