Suggested layouts . . . Just play !
( Not sure if images will show . . .
If not, here they are written out . . .
Layout 01 - A, B, C, D, C, B, A
D, C, A, B, A, C, D
A, B, C, D, C, B, A
D, C, A, B, A, C, D
A, B, C, D, C, B, A
D, C, A, B, A, C, D
A, B, C, D, C, B, A
D, C, A, B, A, C, D
A, B, C, D, C, B, A
Layout 02 - C, D, B, A, B, D, C
D, B, A, D, A, B, D
B, A, D, C, D, A, B
A, D, C, B, C, D, A
D, C, B, A, B, C, D
A, D, C, B, C, D, A
B, A, D, C, D, A, B
D, B, A, D, A, B, D
C, D, B, A, B, D, C
Layout 03 - D, B, C, B, C, B, D
A, D, B, C, B, D, A
D, A, D, B, D, A, D
C, D, A, D, A, D, C
B, C, D, A, D, C, B
C, D, A, D, A, D, C
D, A, D, B, D, A, D
A, D, B, C, B, D, A
D, B, C, B, C, B, D
Layout 04 - A, B, C, D, C, B, A
B, A, B, C, B, A, B
D, B, A, B, A, B, D
C, D, B, A, B, D, C
A, C, D, B, D, C, A
C, D, B, A, B, D, C
D, B, A, B, A, B, D
B, A, B, C, B, A, B
A, B, C, D, C, B, A