Our Cub Scout Pack is participating in the local Halloween Parade. The boys will be walking (in costume) behind a pickup truck. We want to display the US flag, our state flag, and our Pack flag in the bed of the truck. I have agreed to build something to hold the flags. What is the correct arrangement of the flags? Can the US flag be centered in front of the other flags even though we are not technically marching? Or should it be on the marching right? Also, can the flags be angled towards the back of the truck? Any assistance is greatly appreciated.