diff --git a/sunpy/canvas/entity.js b/sunpy/canvas/entity.js
new file mode 100644
index 0000000..7cc2d03
--- /dev/null
+++ b/sunpy/canvas/entity.js
@@ -0,0 +1,12 @@
+export class Entity {
+    constructor() {}
+    async render(renderNode) {}
+    async update(renderNode) {}
+}
+
+export class Sprite extends Entity {
+    constructor(image) {
+        if (!(image instanceof Image)) 
+            throw TypeError("Image has to be instance of `Image`");
+    }
+}
\ No newline at end of file
diff --git a/sunpy/canvas/renderer.js b/sunpy/canvas/renderer.js
index 0d74f75..e200426 100644
--- a/sunpy/canvas/renderer.js
+++ b/sunpy/canvas/renderer.js
@@ -3,6 +3,7 @@ import { PropertyNode } from "../node/nodes/propertynode.js";
 import { PropertyReader, Property } from "../node/propertyreader.js";
 import { sleep } from "../core/utils.js";
 import { Vector } from "../core/vector.js";
+import { Entity } from "./entity.js";
 
 register("canvas", initRenderNode);
 
@@ -31,7 +32,7 @@ export class RenderNode extends PropertyNode {
         this.gl.depthFunc(this.gl.LEQUAL);
 
         this.fps = 0;
-        this.objects = [];
+        this.entities = [];
         this.running = false;
     }
 
@@ -52,11 +53,11 @@ export class RenderNode extends PropertyNode {
         this.running = false;
     }
 
-    add(object) {
-        if (!(object instanceof Renderable))
-            throw TypeError("Object must be instance of Renderable");
+    add(entity) {
+        if (!(entity instanceof Entity))
+            throw TypeError("entity must be instance of `Entity`");
         
-        this.objects.push(object);
+        this.entities.push(entity);
     }
 
     async loop() { // TODO: Fix all variables
@@ -83,22 +84,11 @@ export class RenderNode extends PropertyNode {
     }
 
     async render() {
-
         this.gl.clearColor(0.0, 0.0, 0.0, 1.0);
         this.gl.clear(this.gl.COLOR_BUFFER_BIT | this.gl.DEPTH_BUFFER_BIT);
 
-        for (const object of this.objects) {
-            await object.render(this);
+        for (const entity of this.entities) {
+            await entity.render(this);
         }
     }
-}
-
-export class Renderable {
-    constructor() {
-
-    }
-
-    async render(renderNode) {
-
-    }
 }
\ No newline at end of file
diff --git a/sunpy/node/nodes/propertynode.js b/sunpy/node/nodes/propertynode.js
index 051b71f..4b4bc5e 100644
--- a/sunpy/node/nodes/propertynode.js
+++ b/sunpy/node/nodes/propertynode.js
@@ -6,7 +6,7 @@ export class PropertyNode extends SwapNode {
         super(node, swapNode);
 
         if (!(propertyReader instanceof PropertyReader))
-            throw TypeError("propertyReader must be an instance of PropertyReader");
+            throw TypeError("propertyReader must be an instance of `PropertyReader`");
 
         this.propertyReader = propertyReader;
 
diff --git a/sunpy/node/nodes/swapnode.js b/sunpy/node/nodes/swapnode.js
index 82aa5c8..a7b8311 100644
--- a/sunpy/node/nodes/swapnode.js
+++ b/sunpy/node/nodes/swapnode.js
@@ -5,7 +5,7 @@ export class SwapNode extends BaseNode {
         super(node);
         
         if (!(swapNode instanceof Node))
-            throw TypeError("swapNode must be instance of Node");
+            throw TypeError("swapNode must be instance of `Node`");
 
         this.swapNode = swapNode;