Grid.length is undefined

[arj-ary]

Hello,
In One of your examples here to get a spectrum on audio visualization - https://hackernoon.com/creative-coding-using-the-microphone-to-make-sound-reactive-art-part1-164fd3d972f3 you are trying to iterate through the length of the grid. But your Grid doesn't have a length property. What exactly are you trying to iterate, x and y points? Also, can you point me to the file that has the Grid code in this repo please?

Thanks,
AJ