To make this as easy as it can be I'll go by step by step. Step 1: go on Scratch Step 2: find this project Step 3: press start/the green flag Step 4: click the heart below/would really help I hope you got all that. It is very hard for me to remember and I usually get mixed up with step 1 and 2. I believe you can follow these steps, because I can't. :D
