The LED array is same is in my Knight Rider program -- 10 LED on a breadboard with inline resistors, jumpered to the breadboard pinout and ground from Innovator. Challenge was to modify my program to light a number of LED in the array based on the sensor readout.
Basic ideas weren't hard. I have 10 LED, so divide the readout by 10, and then use a floor function to convert it to integer (used Int(... which is a standard TI-84 function). Then modify my lighting loop, instead of going 1 to 10, go from 1 to whatever the readout specified.
But I also wanted it to go down when light intensity decreased. This threw me for a little while in one of those good ways that is obvious after you thought about it, but is also why coding is a good activity for the brain. (thanks Jo Boaler. my brain grew.) The key was, unlight pin numbers to one greater than the sensor output.
The way I wrote the program, I also echo the sensor reading to the TI-84 screen. I'm sure I could code this much cleaner if I spent some time on it. Here's a short video showing it in operation. It's a cloudy day, so I couldn't get a very high light reading. This morning I was pinning the sensor at 10.