help

You have some missing/mixed up braces. You also cannot create a method like: void Something;

You want your code to be more like this:

void Update() {
   // all of your code goes here
  } // close Update()

void Explode() {
 // explode method code goes here
 }

It’s much better if you post your code with code tags in the future, rather than a screenshot: Using code tags properly