Fruity Pebbles Squares

In a large pot, begin melting the butter.
Add the marshmallows and slowly begin to melt them over med/low heat. You don't want to do this fast or you will scorch the marshmellows
While the marshmallows are melting, grease a 9x13 pan.
When all the marshamallows are melted, work quickly by pouring the cereal into the pot and mixing it well into the marshmallow/butter mixture
Quickly transfer the cereal mixture into the pan. With slight wet hands, press the cereal into the pan and make it even and smooth on top.
Let the mixture completely cool.
After it's cooled, melt the white chocolate chips either over the stove or microwave.
With a spoon, drizzle the chocolate over the squares. Let completely cool and then slice into squares.