Moiré pattern of parallel/perpendicular lines

This example demonstrates the Moiré pattern formed by overlapping parallel and perpendicular lines. It involves core mathematical concepts such as straight lines, rotation, quadratic equations, quadrilaterals, calculus, natural numbers, and combinatorics. The construction utilizes GeoGebra commands/objects like Rotate (for rotation), button1 (button), parameters n, A, B, C, D, CR, DR, d, speed, and a. It is suitable for high school students studying geometric transformations, coordinate geometry, and graphing.