Thank you guys, works flawless!

After echoing a value, the LED lights up for X ms. Is X the smallest possible value (probably 49 ms if LED pattern uses the smallest possible value)? Or is there a way of altering the duration in this scenario?

EDIT: What is the exact difference between led_current and brightness? I did some testing, and got weird results: If I change the brightness of RED to 255 during the orange pulsing battery-charging pattern, the red LED turns on and stays on until the charging-pulse is over. Then everything is back to normal (orange pulse)...
If I set the led_current to 255 tho, the color of the pulsing pattern stays red forever (now pulsing as well)... How to explain that?