The star of dominoes
Arrange all 28 dominoes in the shape of a star with seven rays, so that:
As pictured, at the center of the star are tiles that end with the numbers 0 to 6.
At the outer edges of the rays, the numbers o to 6 also appear exactly once each.
The tiles on each ray are positioned according to the rules of dominoes.
The sums of all the rrays are equal.