Materials
1 x 50 g ball of Cotton DK in colours as:
Atlantis/blue, Tangerine Dream, Gooseberry, Slick & Sunflower.

Four patterns for the coasters are:
Concentric (stripes in the round),
Sprinkles (of colour on outer row)
Firework (change of colour on a row)
Quartz (intarsia of four segments & outer row fifth colour).