truncated gradient

[bloodaxe]

Hi;

This may be a really obvious problem but as a newbie I am not seeing the answer.

Thing is that when I run the code in the attached files I get a red to white gradient across about 4/5ths of the canvas then a black bar which is the underlying black <div> showing through. I have fiddled with the parameters but nothing changes it. does anyone have an idea?

 

index.html

testprojectcss.css