draw_data function breaks for medium to large lists on mobile

[chownces]

As per the title. On Android, a Chrome error page is displayed. On iOS, an empty canvas is drawn.

This issue also exists on the current deployed CS1101S version (using Kinetic.js)

Considering the push for a mobile-friendly Playground, it would be nice if draw_data could work for medium to large lists on mobile (or at least not break the app when ran)

To reproduce:

1. Run draw_data on a medium to large list e.g. draw_data(enum_list(1,50)) (the length of list required to break the app differs from phone to phone)

Android:

iOS: