LAFVIN Obstacle Avoidance Smart Car Kit, Manual, Page: 44 / 80

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You are now going to make your LED blink faster. As you might have guessed, the key to this lies in changing the parameter in () for the
'delay' command.
This delay period is in milliseconds, so if you want the LED to blink twice as fast, change the value from 1000 to 500. This would then pause
for half a second each delay rather than a whole second.
Upload the sketch again and you should see the LED start to blink more quickly.