Bug in random number generation

Description: We have to generate random number between 0 and 3 to select anyone from 4 colors in nextSequence function. But the code now generate any number. Figure out how to generate the number in specific range only.

Look for the nextSequence function in the codebase, likely in a game or utility file. Examine the current random number generation logic, which probably uses Math.random() without proper bounds. Adjust it to produce integers from 0 to 3 inclusive, then test by running the function multiple times to verify the output range.

索引モデルが issue の本文から書いたものです。