Does anyone know the code for the below function declaration?

% create car and locate it on the road car = CreateCar(L,W,H,D,F,R); locate(car,x0,y0); % theta0 is orientation of wheels wrt to x axis aim(car,x0+cos(theta0),y0+sin(theta0));% phi0 is orientation of front wheel with body axis turn(car.tire_fl,'z',phi0*180/pi); turn(car.tire_fr,'z',phi0*180/pi);

I need code for both turn(),aim() urgently, I tried code for CreateCar(),locate(),aim() but i have no idea about both turn()s...pls reply soon...