void setup() {
  size(893, 50);
  smooth();
}

void draw() {
strokeWeight(2);
float offset = 126.0;
float scaleVal = 126.0;
float angleInc = map(mouseX, 0, 893, 0, TWO_PI);
float angle = PI;
for (int x = -52; x <= width; x +=5) {
  float y = offset + (sin(angle) * scaleVal);
  stroke(y);
  line(x, 0, x+50, height);
  angle += angleInc;
}
}