[Detoria]

When the compiler says "undefined symbol",that means that the variable in question didn't exist,so,you don't have the var "distance" and remember,for positions,life bar,armour bar and things that can have any value,use new Float:.

And why are you putting those dots in front of the variables ?
You can only creatr variables with "new",on stock functions or on forward functions,the native functions don't allow you to do those things.