You don’t want a semi colon at the end of the line when your method is declared.
You can work with some scripting tutorials to help get comfortable: Learn game development w/ Unity | Courses & tutorials in game design, VR, AR, & Real-time 3D | Unity Learn
Code tags, mentioned in the previous post: Using code tags properly
Next time you have an error you’d like to ask about, you should post the error in the thread, if you can’t figure it out yourself. That way, readers won’t have to try to figure out what the problem is.