How do i add a background to the image being plotted?

[vinaymcp]

Hello,

I like to add a black background to my below code and the chart lines in white, how do i achieve it ?

plot({
data: [ 3, 1, 2, 3, 4 ],
filename: 'output2.png',
style: 'linespoints',
title: 'Example 'Title', \n runs onto multiple lines',
logscale: true,
xlabel: 'time',
ylabel: 'length of string',
format: 'png'
});

Kindly advice.

Thanks