Daily Lego Maths: Day 8

The pattern below has 7 rows of red and yellow bricks.
Can you work out the sequence?
Can you describe what the eighth row would look like?

7 rows of bricks, getting longer.
Row 1: R
Row 2: Y
Row 3: R Y
Row 4: Y R Y
Row 5: R Y Y R Y
Row 6: Y R Y R Y Y R Y
Row 7: R Y Y R Y Y R Y R Y Y R Y

Is there a quick way to work out how many reds and yellows you would need for future rows?

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