Folding animation
The locking glider – fold slowly
Watch one movement, pause and fold your paper to match. Both sides stay blue. Orange outlines the moving area; an orange dashed line marks the new crease. Blue-grey marks existing creases.
Nothing starts automatically. Pause at any time and take your time folding. The full sequence holds each result for two seconds. Close-ups follow the slider.
You need one A4 sheet and a ruler. Measurement diagrams are enlarged: measure your paper, not the screen. Launch gently into a clear space, never toward people or animals.