How to make a smoke bomb?

Ingredients:

1. Sugar(sucrose)
2. Potassium nitrate which is sold as saltpeter in garden supply stores or sometimes as stump remover

Procedure: 
                  Mix the sugar and Potassium nitrate in the ratio of 2:3 respectively.Now heat the ingredients in a nonstick pan since they melts to form a brownish mixture which may stick to ordinary pans.In ordinary pans hot water may be used to get off the sticky mixture.Once the ingredients melt together, take off from the heat and drop spoonful of the mixture in the foil.Now, it is ready to go out and light up.