text box gml

[put the following in a create event]
delTimer=0;
text="";

[put the following in a step event]

if(keyboard_check(vk_anykey)and string_length(text)<5){
text=text+string(keyboard_string);
keyboard_string="";

}

if(keyboard_check(vk_backspace)and !keyboard_check_pressed(vk_backspace)and delTimer=2){
text=string_delete(text,string_length(text),1);
delTimer=0;
keyboard_string="";
}

if(keyboard_check(vk_backspace)){
text=string_delete(text,string_length(text),1);
keyboard_string="";
delTimer=-4;
}

if(delTimer!=2){
delTimer++;
}
[put the following in a draw event]
draw_self();
draw_set_color(c_white);
draw_set_halign(fa_center);
draw_set_valign(fa_middle);
draw_text(x,y,text);

[note you will also need a sprite for this object]