Drawing random numbers like robot

Toms Numbers

void setup() {
	size(600, 600);
	background(255, 255, 255);
	frameRate(10);
}

void draw() {
	// Random Colour Generator
	float r = random(0, 255);
	float g = random(0, 255);
	float b = random(0, 255);
	// Random Stroke 
	stroke(r, g, b);

	// Create a random number between 1-9
	float n = random(1,2);
	drawLetter(n);
}

void drawLetter(int n) {
	switch(n)
	{
		case 1:
			float x = random(290, 310);
			line(x, 300, x, random(0, 300));
			line(x, 300, x, random(300, 600));
			break;
		case 2:
			float bY = random(570, 590);
			float lX = random(10, 30);
			float tX = random(570, 590);
			float mY = random(290, 310);
			line(590, bY, 10, bY);
			line(lX, 300, lX, 590);
			line(10, mY, 590, 300);
			line(tX, 10, tX, 300);
			break;

	}
}