User blog:PopkornHUPIKO2/need scripting help

okay so, if you know the moving water free model, which when you touch it makes a sound and makes a growing blue circle, i need to figure out how to change the texture of the circle that appears when you touch it. please help me find how to change it and reply if you know. thank you!

the model: https://www.roblox.com/library/289988543/Moving-Water?Category=Models&SortType=Relevance&SortAggregation=AllTime&CreatorId=90907969&Page=1&Position=3&SearchId=0afa8d6b-08e7-49b6-b584-67219cde184e