sending multiple values from processing to arduino

edited October 2018 in Arduino

I have managed to send one value from processing to arduino. (which maps mouseX and lights the respective LED on an LED strip of Neopixels) I went through a lot of forums and tried to send MOuse Position(2 values ) from processing to arduino .. By trying to seperate the numbers using substring and toInt ... But then the programm doesn't seem to be working.
can anyone share an simple example that sends and recieves X and Y values


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