int WIDTH = 400;
int HEIGHT = 200;
int LENGTH = 10;

int NUMBLADES = 30000;
Blade b[] = new Blade[NUMBLADES];

int blend(int org, int col, int alpha) { 
  // org is original colour 
  // col is colour to add 
  // alpha is a value between 0 and 255,  
  // where 0 makes 'col' completely opaque 
 
  int r1=(org&0x0000ff); 
  int g1=(org&0x00ff00); 
  int b1=(org&0xff0000); 
  int r2=(col&0x0000ff); 
  int g2=(col&0x00ff00); 
  int b2=(col&0xff0000); 
   
  int r3=(((alpha*(r1-r2)) >>8 )+r2)&0x000000ff; 
  int g3=(((alpha*(g1-g2)) >>8 )+g2)&0x0000ff00; 
  int b3=(((alpha*(b1-b2)) >>8 )+b2)&0x00ff0000; 
 
  return (r3)|(g3)|(b3); 
  }

void drawline(int x0, int y0, int x1, int y1, int pix, int buffer[]) {
	if(x0 < 0 || x0 >= WIDTH || y0 < 0 || y0 >= HEIGHT || x1 < 0 || x1 >= WIDTH || y1 < 0 || y1 >= HEIGHT) return;
	
	int alp=32;
	
	int dy = y1 - y0;
	int dx = x1 - x0;
	int stepx, stepy;
	
	if (dy < 0) { dy = -dy;  stepy = -WIDTH; } else { stepy = WIDTH; }
	if (dx < 0) { dx = -dx;  stepx = -1; } else { stepx = 1; }
	dy <<= 1;
	dx <<= 1;
	
	y0 *= WIDTH;
	y1 *= WIDTH;
	
	if (dx > dy) {
		int fraction = dy - (dx >> 1);
		while (x0 != x1) {
			if (fraction >= 0) {
				y0 += stepy;
				fraction -= dx;
				}
			x0 += stepx;
			fraction += dy;
			buffer[x0+y0] = blend(pix, buffer[x0+y0], alp);
			}
		}
	
	else {
		int fraction = dx - (dy >> 1);
		while (y0 != y1) {
			if (fraction >= 0) {
				x0 += stepx;
				fraction -= dy;
				}
			y0 += stepy;
			fraction += dx;
			buffer[x0+y0] = blend(pix, buffer[x0+y0], alp);
			}
		}
	}

class Blade {
	float x, y, rot = 1, len;
	Blade(float xIn, float yIn, float rotIn, float lenIn) {
		x = xIn;
		y = yIn;
		rot = rotIn;
		len = lenIn;
		}
	
	void draw() {
		drawline((int)x, (int)y, (int)(x+len*sin(rot)), (int)(y+len*cos(rot)),0xff000000, pixels);
		}
	  
	void update() {
		rot += 0.08;
		}
	}
  
void setup() {
	size(400,200);
	background(#ffffff);
	for(int i = 0; i < NUMBLADES; i++) {
		b[i] = new Blade(random(WIDTH), random(HEIGHT), random(TWO_PI), random(LENGTH));
		}
	}

void loop() {
	for(int i = 0; i < NUMBLADES; i++) {
		b[i].update();
		b[i].draw();
		}
	}