diff --git a/main.ts b/main.ts
index 2d07212..0c06961 100644
--- a/main.ts
+++ b/main.ts
@@ -1,134 +1,84 @@
-import { App, Editor, MarkdownView, Modal, Notice, Plugin, PluginSettingTab, Setting } from 'obsidian';
+import { Plugin } from "obsidian";
 
-// Remember to rename these classes and interfaces!
-
-interface MyPluginSettings {
-	mySetting: string;
+interface Color {
+	r: number;
+	g: number;
+	b: number;
 }
 
-const DEFAULT_SETTINGS: MyPluginSettings = {
-	mySetting: 'default'
-}
-
-export default class MyPlugin extends Plugin {
-	settings: MyPluginSettings;
-
+export default class SVGView extends Plugin {
 	async onload() {
-		await this.loadSettings();
+		this.registerMarkdownPostProcessor((element, context) => {
+			const images = element.querySelectorAll("img");
 
-		// This creates an icon in the left ribbon.
-		const ribbonIconEl = this.addRibbonIcon('dice', 'Sample Plugin', (evt: MouseEvent) => {
-			// Called when the user clicks the icon.
-			new Notice('This is a notice!');
-		});
-		// Perform additional things with the ribbon
-		ribbonIconEl.addClass('my-plugin-ribbon-class');
+			images.forEach((item) => {
+				if (!item.src.startsWith("data:image/svg+xml")) {
+					// Exclude image who aren't SVG
+					return;
+				}
 
-		// This adds a status bar item to the bottom of the app. Does not work on mobile apps.
-		const statusBarItemEl = this.addStatusBarItem();
-		statusBarItemEl.setText('Status Bar Text');
+				/** Convert to grayscale */
+				const colorToGrayscale = (color: Color) => {
+					return 0.3 * color.r + 0.59 * color.g + 0.11 * color.b;
+				};
 
-		// This adds a simple command that can be triggered anywhere
-		this.addCommand({
-			id: 'open-sample-modal-simple',
-			name: 'Open sample modal (simple)',
-			callback: () => {
-				new SampleModal(this.app).open();
-			}
-		});
-		// This adds an editor command that can perform some operation on the current editor instance
-		this.addCommand({
-			id: 'sample-editor-command',
-			name: 'Sample editor command',
-			editorCallback: (editor: Editor, view: MarkdownView) => {
-				console.log(editor.getSelection());
-				editor.replaceSelection('Sample Editor Command');
-			}
-		});
-		// This adds a complex command that can check whether the current state of the app allows execution of the command
-		this.addCommand({
-			id: 'open-sample-modal-complex',
-			name: 'Open sample modal (complex)',
-			checkCallback: (checking: boolean) => {
-				// Conditions to check
-				const markdownView = this.app.workspace.getActiveViewOfType(MarkdownView);
-				if (markdownView) {
-					// If checking is true, we're simply "checking" if the command can be run.
-					// If checking is false, then we want to actually perform the operation.
-					if (!checking) {
-						new SampleModal(this.app).open();
+				/** Extract color using canvas2d */
+				const extractColors = (image: HTMLImageElement) => {
+					const canvas = document.createElement("canvas");
+					canvas.width = image.width;
+					canvas.height = image.height;
+
+					const ctx = canvas.getContext("2d");
+					if (!ctx) {
+						return;
 					}
 
-					// This command will only show up in Command Palette when the check function returns true
-					return true;
+					ctx.drawImage(image, 0, 0);
+					const imageData = ctx.getImageData(
+						0,
+						0,
+						Math.max(1, canvas.width),
+						Math.max(1, canvas.height)
+					);
+					const pixelData = imageData.data;
+
+					const colors: Color[] = [];
+					for (let i = 0; i < pixelData.length; i += 4) {
+						if (pixelData[i + 3] > 0) {
+							colors.push({
+								r: pixelData[i],
+								g: pixelData[i + 1],
+								b: pixelData[i + 2],
+							});
+						}
+					}
+
+					return colors;
+				};
+
+				// Extract colors
+				const colors = extractColors(item);
+				if (!colors) {
+					return;
 				}
-			}
+
+				// Calculate the average grayscale value
+				const grayscaleValues = colors.map(colorToGrayscale);
+				const totalGrayscale = grayscaleValues.reduce(
+					(acc, val) => acc + val,
+					0
+				);
+				const averageGrayscale =
+					totalGrayscale / grayscaleValues.length;
+
+				if (averageGrayscale < 128) {
+					item.setCssStyles({
+						filter: "invert(1)",
+					});
+				}
+			});
 		});
-
-		// This adds a settings tab so the user can configure various aspects of the plugin
-		this.addSettingTab(new SampleSettingTab(this.app, this));
-
-		// If the plugin hooks up any global DOM events (on parts of the app that doesn't belong to this plugin)
-		// Using this function will automatically remove the event listener when this plugin is disabled.
-		this.registerDomEvent(document, 'click', (evt: MouseEvent) => {
-			console.log('click', evt);
-		});
-
-		// When registering intervals, this function will automatically clear the interval when the plugin is disabled.
-		this.registerInterval(window.setInterval(() => console.log('setInterval'), 5 * 60 * 1000));
 	}
 
-	onunload() {
-
-	}
-
-	async loadSettings() {
-		this.settings = Object.assign({}, DEFAULT_SETTINGS, await this.loadData());
-	}
-
-	async saveSettings() {
-		await this.saveData(this.settings);
-	}
-}
-
-class SampleModal extends Modal {
-	constructor(app: App) {
-		super(app);
-	}
-
-	onOpen() {
-		const {contentEl} = this;
-		contentEl.setText('Woah!');
-	}
-
-	onClose() {
-		const {contentEl} = this;
-		contentEl.empty();
-	}
-}
-
-class SampleSettingTab extends PluginSettingTab {
-	plugin: MyPlugin;
-
-	constructor(app: App, plugin: MyPlugin) {
-		super(app, plugin);
-		this.plugin = plugin;
-	}
-
-	display(): void {
-		const {containerEl} = this;
-
-		containerEl.empty();
-
-		new Setting(containerEl)
-			.setName('Setting #1')
-			.setDesc('It\'s a secret')
-			.addText(text => text
-				.setPlaceholder('Enter your secret')
-				.setValue(this.plugin.settings.mySetting)
-				.onChange(async (value) => {
-					this.plugin.settings.mySetting = value;
-					await this.plugin.saveSettings();
-				}));
-	}
+	onunload() {}
 }