This is a Scratch Pack designed to be remixed. Scratch Packs contain sprites and backdrops without any code so that teachers and students can use them to integrate with another subject. This one covers fractions. See this completed project to get ONE idea of how to code: https://scratch.mit.edu/projects/547235406/
Utah Standard 3.NF.2 Understand a fraction as a number on the number line; represent fractions on a number line diagram. Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and partitioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line. Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line.