Pen Settings



CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ add another resource


Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource


Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.


Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.


                <div style="text-align: center; display: inline-block">
  <canvas id="clock-1" height="240"></canvas>
  <p>Modern Dark Preset</p>

<div style="text-align: center; display: inline-block">
  <canvas id="clock-2" height="240"></canvas>
  <p>Custom Configuration</p>






  hasShadow: true,          // enable/disable shadow
  shadowColor: "#000",      // shadow color
  shadowBlur: 10,           // shadow blur size ( unit is pixel )

  drawSecondHand: true,     // draw second hand or not draw
  drawMajorTicks: true,     // draw major ticks or not draw
  drawMinorTicks: true,     // draw minor ticks or not draw
  drawBorder: true,         // draw border or not draw
  drawFill: true,           // draw fill or not draw ( transparent )
  drawTexts: true,          // draw hour text or not draw
  drawPin: true,            // draw pin or not draw

  majorTicksColor: "#f88",  // major ticks color
  minorTicksColor: "#fa0",  // minor ticks color

  majorTicksLength: 10.0,   // major ticks length ( percent )
  minorTicksLength: 7.0,    // minor ticks length ( percent )
  majorTicksWidth: 0.005,   // major ticks thickness ( percent )
  minorTicksWidth: 0.0025,  // minor ticks thickness ( percent )

  fillColor: "#444",        // fill color
  pinColor: "#f88",         // pin color
  pinRadius: 5.0,           // pin radius ( percent )

  borderColor: "#888",      // border color
  borderWidth: 2.0,         // border width ( percent )

  secondHandColor: "#f00",  // second hand color
  minuteHandColor: "#fff",  // minute hand color
  hourHandColor: "#fff",    // hour hand color

  fontColor: "#fff",        // font color
  fontName: "Tahoma",       // font name
  fontSize: 10.0,           // font size ( percent )

  secondHandLength: 90.0,   // second hand length ( percent )
  minuteHandLength: 70.0,   // minute hand length ( percent )
  hourHandLength: 50.0,     // hour hand length ( percent )

  secondHandWidth: 1.0,     // second hand width ( percent )
  minuteHandWidth: 2.0,     // minute hand width ( percent )
  hourHandWidth: 3.0        // hour hand width ( percent )