Garden cushion with braid

This rectangular cushion is worked diagonally. The stripes are worked with contrasting colours. The stitch used for the contrasting stripes makes them look like a braid.

Yarn
Durable Cosy Fine, 60% cotton & 40% acrylic, 50g/105m/115yd
Colour A: 289 Blue Grey, 6 balls
Colour B: 326 Ivory, 2 balls
Colour C: 2228 Silver Grey, 2 balls