The odd rows have one more block than the even rows. So try setting:
Row 1: 3 blocks
Row 2: 2 blocks
Row 3: 3 Blocks
Row 4: 2 blocks
Row 5: 3 blocks
Row 6: 2 blocks
Row 7: 3 Blocks
Row 8: 2 blocks
You might want to either stop at row 7 or make 3 more blocks and do a row 9 to make it symmetrical.
Alternative, make one more block and lay it out like this, or discard 2 blocks use the 4-3 layout and stop at row 5:
Row 1: 4 blocks
Row 2: 3 blocks
Row 3: 4 Blocks
Row 4: 3 blocks
Row 5: 4 blocks
Row 6: 3 blocks