Step one is to create a template from half inch plywood with your hole pattern. This will require a tape measure, pencil, drill, and 2”- 3” hole saw.
Step two is to obtain a torch.
Step three is to secure your plastic on the bed.
Step four is to position your template on the fabric and commence burning.
Step five is to move the template, and place one set of holes on the template over the last set of holes you burned.
Here is a video to watch for visual learners.