Can I pedal my bicycle backwards to move it backwards? Is there any changes I could do to my cycle so that I can make it move backwards?Just a question out of eagerness.
To sum up all the comment answers, which provide you with a wealth of options:


The backwards bike
Retro-direct gearing
The Tri Via gearing system


Some parts of these look rather easy to fabricate such as the idler arms or connecting two forks together. The rear hub is going to be the most difficult part since you have to build two sets of engagement together and fit it in the space of a regular hub.