First

depends.txt

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+default

init.lua

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+
+function technomagic_get_hipotenuse_value(point1, point2)
+    return math.sqrt((point1.x - point2.x) ^ 2 + (point1.y - point2.y) ^ 2 + (point1.z - point2.z) ^ 2)
+end
+
+minetest.register_entity("technomagic:circle", {
+	initial_properties = {
+	    physical = true,
+	    collisionbox = {0,0,0,0,0,0},
+	    visual = "mesh",
+	    mesh = "technomagic_circle.obj",
+        textures = {"technomagic_circle.png^[multiply:#06B5DD"},
+    },
+    textures = {},
+	timer = 0,
+	glow = 15,
+    owner = nil,
+    position = nil,
+	visual_size = {x = 8, y = 8, z = 8},
+
+	on_step = function(self, dtime)
+        if self.owner then
+            local player = minetest.get_player_by_name(self.owner)
+            local pos = player:get_pos()
+            local distance = math.abs(technomagic_get_hipotenuse_value(pos, self.position))
+
+            if distance > 4 then
+		        self.timer = self.timer + dtime
+		        -- remove after set number of seconds
+		        if self.timer > 5 then
+			        self.object:remove()
+		        end
+            end
+        end
+	end,
+})
+
+
+
+minetest.register_chatcommand("circle", {
+    func = function(name, param)
+        local magic_word = param
+        
+        local player = minetest.get_player_by_name(name)
+        local pos = player:get_pos()
+
+
+        if magic_word == "ieaou" then
+            local circle = minetest.add_entity(pos, "technomagic:circle")
+		    if circle and player then
+                local ent = circle:get_luaentity()
+                local owner = player:get_player_name()
+                ent.position = pos
+                ent.owner = owner
+		    end
+        end
+
+        if magic_word == "uoaei" then
+            --lets detect any circle at this radius and remove it
+            local radius_objects = minetest.get_objects_inside_radius(pos, 5)
+            for _, object in ipairs(radius_objects) do
+                if object then
+                    local pos = object:get_pos()
+                    local entity = object:get_luaentity()
+                    if entity then
+                        if entity.name == "technomagic:circle" then
+                            entity.object:remove()
+                        end
+                    end
+                end
+            end
+
+        end
+    end,
+})