You will need:
Cocktail stick or large needle
Knead 4 portions of blue FIMO to soften and roll 5mm deep. Cut a rectangle 3.5cm x 5cm. Roll 2 portions of white FIMO until 2mm deep and cut strips 1cm wide for the vertical and horizontal cross pieces. Cut strips 6mm wide to make the diagonals. Trim the ends at an angle so the strips fit neatly together. Gently roll over your cross to flatten it. Trim any white FIMO from around the edges.
Roll 3 portions of red FIMO until 2mm deep. Cut strips 5mm wide and place over the vertical and horizontal cross pieces. Cut strips 3mm wide, trim the ends at an angle and place over the diagonals. Gently roll over your cross to flatten it. Trim any red FIMO from around the edges.
Gently bend your flag. Make a hole in the corner with a cocktail stick and place onto a baking tray. Oven-bake for 30 mins at 110°C / 230°F and allow to cool. Attach a jump ring through the hole in your flag and add a clasp or clip chain.