Here is a list of components necessary to project a series of flip-flop.
R1, R4 .... 470 Ohm
R2, R3 .... 22k
C1, C2 .... 4.7 V uF/16
D1, D2 .... LED
Tr1, Tr2 .... FCS 9014
Ration voltage that is needed is 9 VDC. If using a 3 Volt power portion (2 pieces battery 1.5 Volt), R1 and R2 can be omitted and the LED cathode feet each connect directly to the collectors of transistors foot related. Foot foot transistors FCS-9014 can be seen in the image below
