Simple Keyboard control of a slider

Hey Guys

This is a really dumb question. I'm trying to create a slider that is control via the arrow keys on a keyboard. I've managed to to increment the slider using the right arrow key, its subtracting from the slider using the left arrow key that is proving somewhat challenging for my (extremely) limited max skills.

Basically i'm trying to create a slider (say that goes between 0 and 10) that when the left arrow key is pressed 0.1 is subtracted from the slider value and when the right hand key is pressed 0.1 is added to the value. I would also like the slider to keep having its value changed with multiple presses of the same arrow key.

Many Thanks