[ittragin]

ok how do i start this off in raptor because to be honest im confused and dont know how to start it..so can someone help me

def main(): 
        endProgramBool = False 
        ammunition = 5 
        fuel = 200.0 
        totalFeet = 0 
        enemyDistance = 200 
         
        while not endProgramBool: 
                print 'Menu Selections: ' 
                print '1 - Fire Weapon ' 
                print '2 - Move Forward ' 
                print '3 - Move Backward ' 
                print '4 - Exit ' 
 
 
                choice = input('Enter your selection ') 
                if choice == 1: 
                        ammunition = fire(ammunition) 
                elif choice == 2: 
                        fuel = moveFor(fuel) 
                elif choice == 3: 
                        moveBackward = moveBack(fuel) 
                elif int(choice) == 4: 
                        print 'Goodbye!' 
                        endProgram() 
                else: 
                        print 'Error: Invalid selection.' 
 
def fire(ammunition): 
        if ammunition >= 1: 
                fire = attack() 
        else: 
                print 'You are out of ammunition!' 
        ammunition = ammunition - 1 
        print ammunition 
        return ammunition 
 
def moveFor(fuel): 
        print fuel 
        moveFor = input ('How far would you like to move?') 
        if moveFor <= fuel: 
                fuel = fuel - moveFor 
        elif fuel == 0: 
                print 'You have no fuel left!' 
        elif moveFor > fuel : 
                print 'You need more fuel to move!' 
        print fuel 
        return fuel 
 
def moveBack(fuel): 
        print fuel 
        moveBack = input ('How far would you like to move?') 
        if moveBack <= fuel: 
                fuel = fuel - moveBack 
        elif fuel == 0: 
                print 'You have no fuel left!' 
        elif moveBack > fuel: 
                print 'You need more fuel to move!' 
        print fuel 
        return fuel 
 
def fuelLeft(fuel): 
        fuelLeft = (fuel - moveFor or fuel - moveBack) 
         
def attack(): 
        print 'How far away is the enemy? ' 
        attackDis = input ('Enter distance in feet. ') 
         
        if attackDis <= 10: 
                print 'Enemy has been destroyed! ' 
                return 
        elif attackDis <= 25: 
                print 'Enemy has been partially disabled. ' 
                return 
        elif attackDis >= 26: 
                print 'The enemy has been unharmed! ' 
                return 
 
def endProgram(): 
        print 'Y or N:' 
        true = raw_input('Do you wish to exit this program?') 
        if true == 'y' or true == 'Y': 
                quit() 
        elif true == 'n' or true == 'N': 
                print 'Welcome back.' 
                return 
        else: 
                print 'Error: Invalid selection.' 
 
#calls main 
main()