Pixel-Composer/objects/o_main/Keyboard_1.gml

/// @description 
var trigger = false;

KEYBOARD_PRESSED = vk_nokey;
kb_time += DELTA_TIME;
if(kb_hold && kb_time >= PREF_MAP[? "keyboard_repeat_speed"]) {
	trigger = true;
	kb_time = 0;
} else if(!kb_hold && kb_time >= PREF_MAP[? "keyboard_repeat_start"]) {
	trigger = true;
	kb_time = 0;
	kb_hold = true;
}

if(!trigger) exit;

KEYBOARD_PRESSED = kb_hkey;

if(keyboard_check(vk_backspace))
	KEYBOARD_STRING = string_copy(KEYBOARD_STRING, 1, string_length(KEYBOARD_STRING) - 1);
else
	KEYBOARD_STRING += keyboard_lastchar;