Seven-year Cycle

Day and Night Cycle

A Symbol Representing a Seven-year Cycle

Once Every Ten Years

Creating Repeating Patterns

Patterns of Repeating Events

A Crystal Structure

Crystallizable Designs

Eight-year Cycle

Create a Periodic Table

Harmonic Pattern

Crystal Structure

A Seven-year Cycle

Pattern of Repeated Shapes

Every Other Day

A Repetitive Pattern

Crystal Structure

A Crystal Structure

Day and Night Cycle

Every Seven Years

Geometric Symmetries

Crystal Patterns

Every Three Years

Repeated Patterns