It’s the next result we should get:



Next step includes creating a new layer and use on it the Gradient Tool (G) to make the layer look, like the next picture indicates it:



Enter the next options Filter>Texture>Grain… to set the parameters, shown below:



Apply the next parameters for this layer too:



That is what we should get:



Choose now the Pen Tool (P) and try to represent four rays, having the color #FFFFCC



Set the next parameters for this layer:



It’s what we get at this stage: