[Sui Yuhao]完成任务（番外篇，与团队项目无关）——How To Tie Your Shoes

　　In this case, we are going to write a spec.

　　Suppose there is a English-speaking alien, and he is unable to tie his shoes. So we have to write a short, simple spec to show him how to tie the shoes. We can also add some pictures in the spec.

Spec: How To Tie Your Shoes

　　This method is divided into 11 steps.

　　Step 1: Make a cross.


　　Step 2: Turn around.


　　Step 3: Pass through and pull.


　　Step 4: Half complete.


　　Step 5: Fold laces into double-strand.


　　Step 6: Make the second cross.


　　Step 7: Turn around.


　　Step 8: Pass through and pull.


　　Step 9: Pull and finish.


　　Now, it is done. And you can tidy up your shoelaces.