Ren'Py Shooting Gallery Mini-game Tutorial, Part 1

In this mini-game tutorial for visual novels made with Ren'Py, I'll be showing you how you can create a fun little shooting gallery. A shooting gallery is a classic game sometimes spotted at carnivals where you aim and shoot at still or moving targets, often depicting ducks, with a cork gun or a more modern approach which is with a laser gun. In this tutorial, we will be creating a shooting gallery with round targets that flip back and forth at specified speeds, and your goal is to hit a target when it is fully up and visible with a cork gun. Once you have hit a target you get points depending on it's size. We'll also implement a countdown timer where the player has to get as many points as possible before the time runs out. This mini-game can be a fun base to start out with to then extend with extra functionality as you please. In this first part, we'll be implementing some variables that will help us set up the cork gun and it's placement/move