IT WORKED! After lots of trials and errors, finally my circuit for the 'BUMPY' robot worked. Now I'll move on to the next step, designing the PCB for it. At the same time the circuit for my walking robot also worked. But for now I'll concentrate on BUMPY. I have yet to decide the body for it. I guess it would be sort of something funky (or slick?). I am still in search of good pair of geared motors. May be I'll have to make them myself. That's all for now.