```// String art, Version 0
// to draw lines... ```
`// Version 1: Vary the stroke color`
`// Version 2: Vary the radius a little using noise`
```float angle;
float cx, cy;
float x1, y1, x2, y2;
float strokeColor; ```
```float strokeDelta; // Define this (V1)
void setup() {
size(500, 500);
smooth();
background(255);```
``` // Initial settings
cx = width/2;
cy = height/2;
angle = 0; // degrees
strokeColor = 0;```
``` strokeDelta = 1; // stroke color will change by 1 (V1)
radiusNoise = random(10); // Variation in radius (V2)
} // setup```
`void draw() {`
``` angle = angle - 3;
float theta = radians(angle);```
``` // vary the radius a little (V2)
``` // compute the end points of line
x1 = cx + radius * cos(theta);
y1 = cy + radius * sin(theta);```
``` x2 = cx + radius * cos(theta+PI);
y2 = cy + radius * sin(theta+PI);```
``` // Draw the line
// Modify stroke color properties (V1)
strokeColor = strokeColor + strokeDelta;
if (strokeColor > 255 || strokeColor < 0) {
strokeDelta = strokeDelta * -1;
}```
``` stroke(strokeColor);
strokeWeight(1);
line(x1, y1, x2, y2);
} // draw()
```