#5 Rebuild something in my mind

When thinking about Git yesterday, so many questions came up and I did not know what to do.But then, I asked myself a question:what will I do if I build a new git myself. Then all of a sudden, I figured out many things I did no know.This remembered me of a quote by some famous people : "Do not dissect a frog, build it". When I solved many questions just by a single evening, It was really AWESOME!!!