diff --git a/src/main.c b/src/main.c
index ec8a16a..3b83e24 100644
--- a/src/main.c
+++ b/src/main.c
@@ -26,14 +26,16 @@
 
 static void vga_pixel_program_init(PIO pio, uint sm, uint offset)
 {
-	// magic definition of the called function?
-	pio_sm_config config = vga_free_run_program_get_default_config(offset);
+	// config function automatically declared by SDK scripts
+	// based on the names given to programs in .pio
+	pio_sm_config config = vga_pixel_program_get_default_config(offset);
+
 	// destination pins for OUT instructions
 	sm_config_set_out_pins(&config, 22, 1);
 	sm_config_set_out_shift(&config, true, true, 0);
 	pio_gpio_init(pio, 22);
 	pio_sm_set_consecutive_pindirs(pio, sm, 22, 1, true);
-	sm_config_set_wrap(&config, offset + vga_free_run_wrap_target, offset + vga_free_run_wrap);
+	sm_config_set_wrap(&config, offset + vga_pixel_wrap_target, offset + vga_pixel_wrap);
 
 	pio_sm_init(pio, sm, offset, &config);
 
@@ -197,9 +199,9 @@ int main()
 	// VGA pixel program
 	vga_pixel_ptr = &vga_pixel;
 	printf("Starting VGA pixel machine... ");
-	if (!pio_can_add_program(vga_pixel.pio, &vga_free_run_program))
+	if (!pio_can_add_program(vga_pixel.pio, &vga_pixel_program))
 		panic("cannot add program");
-	vga_pixel.offset = pio_add_program(vga_pixel.pio, &vga_free_run_program);
+	vga_pixel.offset = pio_add_program(vga_pixel.pio, &vga_pixel_program);
 	vga_pixel.sm = pio_claim_unused_sm(vga_pixel.pio, false);
 	vga_pixel_program_init(vga_pixel.pio, vga_pixel.sm, vga_pixel.offset);
 	pio_sm_put_blocking(vga_pixel.pio, vga_pixel.sm, 640 - 1);
diff --git a/src/vga.pio b/src/vga.pio
index f43e54c..5884897 100644
--- a/src/vga.pio
+++ b/src/vga.pio
@@ -1,6 +1,6 @@
-.program vga_free_run
+.program vga_pixel
 
-entrypoint_vga_free_run:
+entrypoint_vga_pixel:
     pull
     mov y, osr