Irish Chain In Progress!

Sew together the two 2-1/2" x 20" Color 1 and one Color 2 strips along the long edges...then cut this at 2-1/2" intervals to make eight units, as shown at right...

Sew together the two  2-1/2" x 12-1/2" Color 1 and one Color 2 strips along the long edges...then cut this at 2-1/2" intervals to make five units, as shown at right...

Sew together the two  2-1/2" x 5" Color 2 and one Color 1 strips along the long edges...then cut this at 2-1/2" intervals to make two units, as shown at right...

Lay out and sew together four corner units, as shown at right...and also sew one center unit, that I forgot to photograph at this stage!

Lay out and then sew the units you just made, with four Color 3  6-1/2" squares...as shown at right...