This draws a circle at coordinate {5,5}. PlotRange specifies the size of the drawing area:

Use RandomReal to draw circles at random positions.

This gives a random number between 0 and 10. Each time you run the code, you get a different number:

This gives a list of two random numbers:

This draws a circle at a random position. Each time you run the code, the circle is drawn in a different place:

Use Table to draw lots of circles. Table makes lists of things.

This gives a list of 10 random coordinate positions:

This draws 10 circles in random coordinate positions:

If you don’t specify a PlotRange, the output will be just large enough to contain all the circles:

This draws a circle at {5,5} with a radius of 1.5:

Use RandomReal to specify a random radius. Each time you run the code, you get a different size of circle with a radius between 0 and 1.5:

Make both the positions and the radii of the circles random:

Use Disk instead of Circle to get a filled-in shape:

Make the disk red:

Make the disk a random color. Each time you run the code, you get a different color of disk:

Make disks with random colors, random positions, and random sizes:

Add Opacity[.5] to make the disks 50% opaque (which is 50% transparent):

Deploy the “circlescape” code to the Wolfram Cloud where anyone with a browser can use it:

Click the link in the output to visit the site. Refresh the page in your browser to get a new circlescape.

Tell the world about your creation by sharing the link via email, tweet, or other message.