Fill a tall glass with ice cubes.
Pour the orange juice into the glass until it is about halfway full.
Slowly add the cranberry juice by pouring it over the back of a spoon to create a layered effect.
Next, gently pour in the pineapple juice, again using the back of a spoon for layering.
Finally, drizzle the grenadine syrup slowly down the side of the glass. It will sink to the bottom, creating a beautiful gradient.
Garnish with an orange slice and a maraschino cherry on top.
Serve immediately and enjoy your refreshing drink!