How does a mRNA vaccin work?

First of all, I am not a doctor or a scientist. But I felt the need to make a (very simple) personal (visual) explanation of the new mRNA vaccine, based on information I could find online (06-2021). I initially made these for myself and family members. But I notice around me that many people have no idea how much the mRNA vaccine is different from a 'classic' vaccine. That's why I made this accessible to a wider audience.