A tutorial
in PSPV7
You will need EC3 for this and you can d/l
it from here
Open a new transparent image 200 x 200 or the size you prefer
add a new raster layer and flood with the colour of your choice
( I have used black )
on layer 2 with your draw tool set to these settings
Using the colour of your choice draw something like this 
now apply EC3's jiggle filter
with
these settings
Duplicate layer 2 a few times 
On layer 2 apply the lighting effect
with these settings
on layers 3 and 4 leave the settings the same, changing the colour on
each layer to something of your choice
On layer 3 using the deformation tool you can change the direction or
shape to whatever you want
( holding down control key while clicking on a corner node gives you
more options and the same if you hold down the shift while clicking on
a node)
Do the same with layer 4
Now play with the opacity slider on each layer and find an effect
that is pleasing to you
Add some logs, stones, etc under your fire
And there you have it
I hope you have enjoyed this small tutorial