This sketch is created with an older version of Processing,
and doesn't work on browsers anymore.
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float x2;
float y2;
int clicked =-1;
void setup()
{
background(20,42,67);
size(500,500);
smooth();
}
void draw()
{
//background(mouseX/2, mouseY/2, mouseY/2, mouseX/2);
// rect(0,mouseY,width,1);
//stroke(mouseX/2, mouseY/2, random(255));
stroke(mouseX/2, random(255), mouseY/2, 80);
//if (clicked==1)
//{
line( mouseX,mouseY,x2,y2);
//}
}
void mouseClicked()
{
x2=random(255);
y2=random(255);
clicked*=-1;
}