MAX7219 Adding Special patterns to scrolling text code and adjust speed via POT

@OP

Check if there is any immediate affect in the scrolling speed by doing --

1 Comment out the following lines in the loop() function.

//scrollSpeed = map(analogRead(A1), 0, 1023, 0, 500); 
//delay(100);
// clearLCD(maxInUse, scrollSpeed);

2. Modifying the following line in the 'printCharWithShift()' function as indicated.

delay(map(analogRead(A1), 0, 1023, 0, 500));//shift_speed);