find yellow pixel

I'm trying to recognize location of some random numbers(10px height).

There's part of the code:

r, g, b = getColor(Location(1,1))
usePreviousSnap(true)
x=31
y=300
while( y < 900) do
x=31
while( x < 710) do
r, g, b = getColor(Location(x,y))

if ( r > 200 and g > 200 and b < 20) then
--toast("x-" .. x .. " y-" .. y .. " r-" .. r .. " g-" .. g .. " b-" ..b)
click(Location(x-30,y+30))
x=x+40
end
x=x+1
end
y=y+8
end
usePreviousSnap(false)


How to make script executing faster?

I also tried to use exists function with yellow1x1.png file, but nothing to happend.