You are building a prompt to help a language model solve simple logic puzzles. For the problem below, create a single, complete example demonstration (including the problem, a step-by-step thought process, and the final answer) that could be used as one of the examples in a few-shot chain-of-thought prompt.

Problem: There are 5 boxes. The red box is to the left of the blue box. The green box is to the right of the yellow box. The blue box is between the yellow and purple boxes. The yellow box is not at either end. What is the order of the boxes from left to right?