After that, I opened each individual photo in PhotoShop to apply the green for the alien effect. I did this by using the 'Quick Selection' tool and sometimes the 'Lasso' tool to select the part of my face that my hand just went over and made adjustments in Properties > Selective Colour.
To save it as a GIF file i went to 'File', clicked on 'Save for web' and exported it using the right settings.
