void setup() 
{

size(400, 400); 
background(30); 
  

}

void loop()

{

 
float a = 40.0+mouseY; 
float b = 25.0*9-mouseX; 
float c = a*5.0+mouseY; 
float d = a*3.8-b; 
float e = b-a; 
float f = b*7.9-mouseX-mouseY; 
float g = f/e*10+mouseX; 
float r = random (50);

float x = random (255);
float y = random (255);
float z = random (255);

stroke (x,10,100);
line(a+r+mouseX,f/r+mouseY,b-r+mouseX,r-g+mouseY);

 stroke (35,y,57); 
line(b-r-mouseY,r+e-mouseX,1/r*-mouseY,r*g+mouseX);

stroke (230,108,z);
line(b+r-mouseX,e-r+mouseY,d*r/2-mouseX,r+c/4+mouseY);

stroke (x,76,z);
line(a-mouseX,e+mouseY,d-e+mouseX,c+mouseY); 
}