he has _startup() at the name.that means it starts automatically
here i correct and tested it:
////////////////////////////////////////////////////////////////////
#include <acknex.h>
#include <default.c>
////////////////////////////////////////////////////////////////////
function quit_program()
{
sys_exit("");
}

BMAP* firebackground = "awesome-fire-dragon-ablaze.jpg"; // dragon fire background with button on it

PANEL* first_pan = // my first panel
{
pos_x = -40;
pos_y = 0;
layer = 1;
bmap = firebackground;
button(300, 0, "stopclicked.jpg", "stopnormal.jpg", "stopnormal.jpg", quit_program, NULL, NULL);
flags = OVERLAY | SHOW;
}
BMAP* pngRobot = "LDDScreenShot1.png"; // robot in foreground

PANEL* second_panel =
{
pos_x = -270;
pos_y = -100;
layer = 2;
bmap = pngRobot;
flags = OVERLAY | SHOW;
}

/////////////////////////////////////////////////////////////////////
BMAP* arrow = "arrow.bmp";

function mouse_toggle() // switches the mouse on and off
{
mouse_map = arrow; // use arrow as mouse pointer
if (mouse_mode >= 2) { // was it already on?
mouse_mode = 0;
} else {
mouse_mode = 2;
}
while (mouse_mode > 0) // move it over the screen
{
vec_set(mouse_pos,mouse_cursor);
wait(1);
}
}
function main()
{
video_mode = 7;
screen_color.red = 100;
mouse_toggle();
}