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@@ -69,8 +69,8 @@ def flow(grid, w):
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# break condition above checks fow clay and water, but we only
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# keep flowing through sand
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- lflow = not lwall and grid[left] == SAND
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- rflow = not rwall and grid[right] == SAND
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+ lflow = grid[left] == SAND
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+ rflow = grid[right] == SAND
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if lflow and rflow:
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# flow continues on both ends, fork
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Taddeus Kroes