I need a little bit of help because I'm new at this.

I'm trying to make a mod that I would like to maybe publish, or just use in my own Minecraft game, The idea is just a prism stone from Dark Souls. If you're unfamiliar with how Prism stones work, you drop a Prism Stone off a ledge. If it falls and lands, it lights up then. The drop to the ground is safe, but if you drop it off a ledge and it shatters, then it is unsafe to drop down. A survivable fall in Minecraft is 23 blocks, and a fatal drop in Minecraft is 24 blocks. So if dropped past 24 or higher, the prism stone would shatter. So my question is, how would I program this? Where would I start. P.S. When dropped when safe, the prism stone lights up a random color every time. Here is an example of how they work. https://youtube.com/shorts/iadE58nYZxA?si=FlpMFu6mSkVXjZei