Rule number or transform:
Number of iterations:

Notes: Transform is a three-digit number. Each of the three digits must be from 0 to 7. Digit 0-3 means rotation by 0,90,180,270 degrees. Digit 4-7 means vertical flip followed by rotation of 0,90,180,270 degrees. First digit is transformation of upper-left; second for upper right and third is for lower third. The resulting rule is also shown graphically in bottom right. There is a total of 8^3=512 different rules, although some of them produce the same patterns.
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