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<!DOCTYPE html> <html> <head> <title>Title of the document</title> </head> <body> <script> function sleep(ms) { return new Promise(resolve => setTimeout(resolve, ms)); } const doSomething = async() => { document.write('Wait for 2 seconds!'); await sleep(2000) document.write('After 2 seconds!'); } doSomething(); </script> </body> </html>