8x8 Scrolling LED display (Simple example)

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hello again I menaged to display letter M on 5x7 dot matrix with this changed code is this a good solution

' SIMPLE 8X8 LED MATRIX SCROLLING EXAMPLE
' 16F872 External 4MHz Xtal Osc
' LED Matrix columns are conected to PORTC pin rc0 via ULN2004AN and CD4017 to 0v.
' RC1 reset for 4017
' LED Matrix rows conected to PORTB via 100 ohm resistors (Resistor value dependant on LEDs used)
' RB0 - top row
' MCLR (pin1) connected via 4K7 to +5v supply.
'
' today
'***************************************************************************************
Device 16F877A
TRISB = %00000000
TRISC = %00000000
PORTB=0
PORTC=0
	kolona		var	Byte
	brojac		var	Byte
	scan 		var Byte
	scroll		var	Byte
	leddata		VAR Byte[5]

START:

	Clear  				

	leddata[0] = $FF	'start of 'm'
	leddata[1] = $40 
	leddata[2] =$20
	leddata[3] =$40
	leddata[4] = $FF
LOOP:
 
	'For scroll =  0 To 34
		
	For scan = 0 To 12	' scan speed
		PORTC.1 = 1  'reseting 4017
            PORTC.1 =0
			For kolona = 0 To 4
			PORTC.0 = 1 'clock 4017
                PORTC.0 =0
                PORTB = leddata[kolona]
				DelayUS 500
                PORTB=0				
			Next
	Next 

	GoTo START
End

any idea how to change letters????