main:
   push ebp  ;save ebp
   mov ebp, esp ;mov ptr to stack into ebp, EBP = ESP
   sub esp, 4 ;subtract 4 from stack ptr reserves 4 bytes (1 long local variable aNumber)
   mov ecx, [EBP+8]  ; move parameter1's value into eax
   mov [EBP - 4], ecx ; move parameter's value into aNumber
   mov EAX, ECX ; set the return value
   add esp, 4 ; unreserve the 4 bytes for the local variable aNumber
   mov esp, ebp ;set stack back equal to its original value
   pop ebp ;take the saved EBP value off the stack
retn 4 ;
; the return VALUE (aNumber) is always stored in EAX, this return statement is to fix the stack because 1 4byte parameter was passed with the function