If you are trying to make a fade effect, i'd recommend using dxDrawImage so that you can just declare the alpha to a variable, and every render you can lower the alpha.
Example:
local alpha = 255
addEventHandler ( "onClientRender", root, function ( )
dxDrawImage ( 690, 200, 100, "R1.png", 0, 0, 0, tocolor ( 255, 255, 255, alpha ) )
if ( alpha > 25 ) then
alpha = alpha - 1
end
end )