it took me a couple of goes for it to look right as when i got bits wrong the colours ruined the white fimo. not to difficult though. make a big hole for the necklace chain, the chain i wanted to use didnt fit so i had to use something else instead. enjoy :)
1
flatten two balls of white and red fimo. spread the red one out more so it is thinner.
2
flatten one side of the red circle and put it on one half of the white circle. i cant really describe how it should look so look at the picture
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3
tuck the extra pieces from the red circle around the back and smooth them down.
now roll out a long, thin, black sausage shape and two much smaller balls - one slightly bigger white one and one grey
5
flatten the grey and white balls and stick them on each other. then use the black sausage shape to line the large white circle.
6
use some more black sausage shape to cover the line between red and white and stick the smaller circles on top. with a pin put a hole through the top, cook the fimo and put a necklace chain through the hole.