i've done the part with the opacity.....but i'm still looking for a way to separate the appearence of the lines. I must a play a different sound for each line.
That's why so important for me to make the appear separate, one after another...
to be more precise:
i press the button, a black line appears and I hear a Do, then another black line appears, I hear a Re, another black, I hear a Mi, a RED line appeara, I hear a FA and so on
