Step 1: Get pictures of you or something holding a stick or a pole.
Step 2: open this image in gimp and select the layers option, create a new layer and make it “foreground” and change the colour to black.
Step 3: click above the layer, and put the view type on “screen”.
Step 4: select the paths tool, and draw a path around the selected piece of the image you wish to be a light sabre.
Step 5: Select the path to selection button, and then select the pencil or paint brush tool, and pick white.
Step 6: when you have your pen/brush on white, fill in the area you have made into a path.
Step 7: when you have made it white, right click on the layer you made, and click on duplicate layer, then duplicate that layer again.
Step 8: you now have 3 layers, I want you to select the first layer, click on filters-blur-Gaussian blur, then select 10, then repeat this with the next layer, and then select 20- repeat this again and do 40.
Step 9: if you wish to have a white light sabre, you have finished, so save your image if you want a collared one, proceed to step 10.
Step 10: select colours, and colour filters-> then move the colour sliders left or right to make a colour appear on the light sabre.