I first uploaded the green screen footage which i wanted to edit.
I then copied the the footage i then pasted it in another layer above the previous footage, i then inverted the footage so that it became negative.
In a similiare way that i edited the green screen footage, i used the chromer keyer to get rid of the all the green screen by keying it out using the keyer settings. I then used the colour tool to select the colour that i wanted to keep.
I then used a colour key so that i could key out the other colours apart from my selected colours.