Time 1:
_str += str[i];
i++;

if(i >= str.length) 'Time 1' - remove;

Create:
i = 0;
_str = '';

'Time 1' - start (0.5s)

Step:
if pressed_key space { _str = str; 'Time 1' - remove; }

Draw:
draw_text(_str, 10, 10);

text="random text";
textdraw="";
alarm[0]=5;
n=1;

if n<=string_length(text)
{
textdraw+=string_copy(text,n,1); n+=1;
if string_copy(text,n,1)!=' ' {alarm[0]=5} else {alarm[0]=1}
}

draw_text(x,y,textdraw)