Basic flame effect for bonfire

mods/bonfire/init.lua

@@ -1,4 +1,24 @@
 bonfire = {}
+local null = {x=0, y=0, z=0}
+
+local function add_fire(pos)
+        pos.y = pos.y-0.2
+        minetest.add_particle(pos, null, null, 4,
+                                           6, true,  "bonfire_fire"..tostring(math.random(1,2)) ..".png")
+        pos.y = pos.y-0.2
+        minetest.add_particle(pos, null, null, 4,
+                                           6, true, "bonfire_fire"..tostring(math.random(1,2)) ..".png")
+end
+
+
+minetest.register_abm({
+        nodenames = {"bonfire:self_active"},
+        interval = 1,
+        chance = 1,
+        action = function(pos)        
+                add_fire(pos)
+        end
+})
 
 bonfire.formspec =
 	"size[8,9]"..