I made my twitter handle scroll across the screen, changing colors as it goes - pretty simple effect, but here’s the Arduino code:

#include <Adafruit_NeoPixel.h> 
#include <Adafruit_GFX.h> 
#include <Adafruit_NeoMatrix.h>

#define PIN 1

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(8, 8, PIN, NEO_MATRIX_TOP + NEO_MATRIX_RIGHT + NEO_MATRIX_COLUMNS + NEO_MATRIX_PROGRESSIVE, NEO_GRB + NEO_KHZ800);

void setup() { 
    // put your setup code here, to run once: 
    matrix.begin(); 
    matrix.setTextWrap(false); 
    matrix.setBrightness(30); 
    matrix.setTextColor( matrix.Color(0, 0, 255) );
}

int x = matrix.width();

int colorRotator = 0;

void loop() { 
    // put your main code here, to run repeatedly: 
    matrix.fillScreen(0); 
    matrix.setCursor(x, 0); 
    matrix.print(F("@jefflinwood")); 
    if(--x < -70) { 
        x = matrix.width(); 
        colorRotator++; 
    } if (colorRotator > 3) { 
        colorRotator = 0; 
    } if (colorRotator % 3 == 0) { 
        matrix.setTextColor( matrix.Color(0, 0, 255) ); 
    } else if (colorRotator % 3 == 1) { 
        matrix.setTextColor( matrix.Color(0, 255, 0) ); 
    } else { 
        matrix.setTextColor( matrix.Color(255, 0, 0) ); 
    } 
    matrix.show(); 
    delay(100); 
}