How to graphically plot
$$ x(t) = \sum_{n=-\infty }^\infty e^{-|t-2n|}$$
Please tell me how to plot the graph of the above function. Also please suggest some online tool where I can ploot this. I am having difficulty in plotting this as it involves two variables n and t.(It would be of great help if you would plot the graph from online graph plotters and paste the link here).thank you