Move the slider to change the number. Click T to make the number change every second. Click T again to stop it. Click L to see the letters. Click the dot to turn it on/off. Click R to reverse T. If the number on the slider becomes higher than 9 or a negative number, move the slider to any number other than 0 or 9.
I recoded the segments. If you compare the code from the first one to this one, you will see that they are a lot different.