Escalator

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path fill="none" d="M0 0h24v24H0z"/><path d="M19.5 4a3.5 3.5 0 0 1 0 7h-1.086l-8.12 8.121a3 3 0 0 1-1.924.872L8.172 20H4.5a3.5 3.5 0 0 1 0-7h2.084l8.123-8.121a3 3 0 0 1 1.923-.872L16.828 4z"/></svg>