Right click attack

⚠Warning: Bad English⚠

Hello MCreator user, i'm making a XTale mod From Underverse. I need help with something:

I'm making right now XFrisk and i wanna make an attack when do right click. The attack will be:

When clicked with right button on the mouse gonna add under me a custom block which goes forward by 6. After that wait like 5s and then there will be a explosion that don't break blocks. after the explosion there will be coal that replace the custom block. That's all.

I tried to do it but it don't work. Idk why.

pls help lol :D