Add 1/4 teaspoon Gum-Tex to 1/2 package of each color fondant. Roll out 1/8 in. thick. Cut 4 hearts in each color using medium Cut-Out. Let dry 48 hours. Attach hearts to wires with melted candy; let set. Tape wires together using florist tape. Bend end of wires to create a cascade.
Bake and cool 2-layer 6 and 8 in. cakes. Prepare cakes for stacked construction on cake base. Ice cakes lightly in white buttercream. Using Cake Divider, divide 6 in. cake into sixths and 8 in. cake into eighths.
Roll out remaining fondant 1/8 in. thick. Using Cutter/Embosser or a knife, cut 3 or 4 rectangles, each 3 x 3 1/4 in., in each color (14 total needed). Using medium Cut-Out, cut out heart shape at center of each rectangle. Attach rectangles to cakes with buttercream. Roll out remaining fondant 1/8 in. thick. Using narrow end of tip 12, cut 5-6 dots in each color for each rectangle; attach in random pattern to rectangles with damp brush. Cut one dowel rod to 6 in.; insert in cake top. Position wired hearts in dowel rod.