A pendulum is a weight on a string that swings from side to side, like a playground swing or the weight in an old clock. You are going to animate one, so first think about how a real one moves.

Picture a playground swing, or watch your teacher swing something on a string. Notice where it seems to stop for a moment and where it rushes past.

Today you will draw the arc, or curved path, and animate the first swing in wickeditor.com, which needs no account.

Every frame stays on the screen for the same length of time. So the only way to make something look faster is to move it further between frames.

A pendulum is a string with a ball on the end, called the bob. Draw both, then add a guide behind them: a grey arc that shows the path the bob swings along, with small circles that mark where it stops on each frame.

Now make the bob swing out to the left, one frame at a time. In each new frame, paste the bob, drag it to the next small circle on the arc, and draw its string.

The small circles are far apart near the bottom and close together near the end, so the bob rushes through the middle and slows down as it rises, like a real pendulum.