How to make a simple collision box in Scratch

Hello, everyone, today I will teach you how to make a rough collision box

This teaching does not require expansion, self-made building blocks, variables, or lists

First clarify the principle

figure 1

we want to be the first

And everyone, don't be the second

Error demonstration:

then it becomes

cough cough cough

this is what we don't want to see

so you can do

that's it

whole code

hope it helps you