10

int barWidth = 2;
int[]hue;

void setup(){
size(400,400);
colorMode(HSB,360,height,height);
hue = new int[width/barWidth];
noStroke();
}

void draw(){
int j =0;
for(int i =0; i <=(width-barWidth);i+= barWidth){
if((mouseX>i)&&(mouseX < i+barWidth)){
hue[j] = mouseY;
}
fill(hue[j],height/1.2,height/1.2);
rect(i,0,barWidth,height);
j++;
}
}