{ Declare which GCL version we are using }
gcl0x

{
  Set $7f00 as code destination (default is $200)
  This loads Blinky at the bottom of screen memory so we
  can see the program after it has loaded
}
*=$7f00

{
  Setup a pointer to a pixel in the middle of the screen:
    $4450       Loads a 16-bit value in the accumulator (vAC)
    p=          Writes vAC to variable p
  Note: The pointer p is a 16-bit integer variable
  The GCL compiler allocates an address for it in zero-page
}
$4450 p=

{
  Execute the main loop:
    [do         Mark the beginning of a loop
    p.          Write vAC's low byte to the memory pointed by p
    1+          Increment vAC by 1
    loop]       Loop forever
}
[do p. 1+ loop]