Moving a Picture Using Types

I need help moving a picture or a character across the screen using types.I've been trying to but it's not working.It'd be really really nice if someone could make a program for me with comments explianing what you did.You could even just write me a program.Try to keep it basic though.

Hopefully this helps:

;define a user type
Type tPlayer
	Field image  ;holds image
	Field x		 ;x-position
	Field y		 ;y-position
End Type


Graphics 800, 600, 0, 2
SetBuffer BackBuffer()


tP.tPlayer = New tPlayer ;create new tPlayer

	;now 'tP' is the newly created tPlayer

tP\image = MakeImage()   ;load image into this tPlayer's image field
     					 ;you can replace MakeImage with LoadImage()

tP\x = 0				 ;set this tPlayer's x and y fields
tP\y = 300



Repeat

	Cls  ;clear screen
	
	For tP.tPlayer = Each tPlayer  ;following code goes for each tPlayer
	
		;now, 'tP' is the current tPlayer
	
		DrawImage tP\image, tP\x, tP\y   ;draw tP's image at tP's "x" and "y"
		tP\x = tP\x + 1                  ;add one to tP's "x"
		
	Next
	
	Flip  ;show screen
	
Until KeyHit(1)

End




;-------------creates an image
Function MakeImage()

	im = CreateImage(64, 64)
	Oval 0, 0, 64, 64
	GrabImage im, 0, 0
	Return im
	
End Function