Testing Typewriter effect using a canvas element

Graph of a Quadratic function using Google Image Charts API via URL with Axes in black and function in red

https://chart.googleapis.com/chart?cht=lxy&chs=250x250&chd=t:-1|-1|-1|-1|-1|-1&chfd=0,x,-10,10,.1,x|1,y,-10,10,.1,y^2|2,x,-10,10,.1,x|3,y,-10,10,.1,0*y|4,x,-10,10,.1,0*x|5,y,-10,10,.1,y&chds=-10,10&chxr=0,-10,10|1,-10,10&chxt=x,y&chg=5,5,1&chco=FF0000,000000,000000

Graph of a quadratic using the Google Image Chart API

Graph of a quadratic using 1xy graph:
https://chart.googleapis.com/chart?cht=lxy&chs=250x250&chd=t:-1|-1&chfd=0,x,-10,10,.1,x|1,y,-10,10,.1,y^2&chds=-10,10&chxr=0,-10,10|1,-10,10&chxt=x,y&chg=5,5,1

Graph of a line

https://chart.googleapis.com/chart?cht=lxy&chs=250x250&chd=t:-1|-1&chfd=0,x,-10,10,1,x|1,y,-10,10,1,y&chds=-10,10&chxr=0,-10,10|1,-10,10&chxt=x,y