From the pattern description:
The Retro afghan combines Fair Isle tank-top stripe patterns and Seventies’ graphics in a subtle palette of colours to bring the spirit of the flamboyant decade into present-day living.

Yarn:

• 12 x 50g balls in mid-yellow
• 12 x 50g balls in mid blue
• 11 x 50g balls in chocolate
• 5 x 50g balls in light beige

Other Materials:

• 1 pair US2-3 (3mm) needles
• 2 circular US 2 (2.75mm) needles 32in (80cm) length
• cable needle