Level 584 is the ninth level in Gummy Gardens and the 252nd jelly level. To pass this level, you must clear 2 single and 7 double jelly squares in 19 moves or fewer.
When you complete the level, Sugar Crush is activated and will score you additional points.
The outside board does not fill with
candies, so the jellies must be cleared from the small main board in the middle. You need to use a colour bomb to complete this level now. Even with four colours, those are hard to come by due to the restricted space.
The jellies are worth 16,000 points, which is equal to the one-star target score. 
Try to destroy the
cake bomb and then use special candies to clear the first layer of jelly. Since the position of the conveyor belt has changed, it is no longer a viable strategy to use the striped+striped combination to clear the second layer of jelly.
To clear the second layer, form a colour bomb and use it to detonate the bottom striped candy on the conveyor when it is on the right.
↑ (2 single jellies × 1,000 points per single jelly) + (7 double jellies × 2,000 points per double jelly) = 16,000 points
Candy Crush Saga Level 584 (Jelly level) - 3 Stars Walkthrough, No Boosters