Hit the reset button(SPST SWITCH) to reset it to 1-bit. Then, hit the clk button(SPDT SWITCH) to cycle through the LEDs. Remember, the switches are used as buttons, so it's operated by "1" + "0".
RED LED------------1 BIT LOWER RIGHT SPDT SWITCH-------CLOCK(CLK) INPUT
YELLOW LED------2 BIT UPPER LEFT SPST SWITCH------------RESET INPUT
GREEN LED--------3 BIT
BLUE LED-----------4 BIT