The procedure describes how the experiment will be conducted in a step by step sequence. It may help you to think of the procedure as a recipe, in which every step is clearly explained. How will your materials be used, and how and when will they be measured? Another person should be able to follow the procedure of your experiment and get the same, or similar, results.
You may use other procedures as a guide, but you must design and write your own procedures for your experiment. Procedures should be written as numerical steps.