// Rewrite the is_sbp function to return TRUE and FALSE
var is_sbp = colour => (colour === "sky_blue_pink") ? TRUE : FALSE;

// Store the responses to the colour test as a PAIR
var colourResponses = PAIR(pigs.fly)(elephants.jump);

// Now we can decide what action to take based on the colour
colourResponses(is_sbp("sky_blue_pink"));   // -> pigs.fly
colourResponses(is_sbp("cherry_green"));    // -> elephants.jump