How to make the color of line segments change all the time in Geometric Sketchpad

Open the geometric sketchpad, select the [Line Segment Tool] in the toolbox on the left, draw the line segment AB in the blank area, and then use the [Point Tool] to draw any point O on the line segment.

Use the [Point Tool] to draw a point C arbitrarily outside the line segment, select point O and point C on the line segment, click the [Measurement] menu above, and select from the pop-up drop-down menu [Distance], so as to measure the distance between point C and animation point O.

Select the distance measurement value between the two points in the upper left corner of the drawing board and the line segment AB, click the [Display] menu above, select [Color] under the drop-down menu, and then continue to select [Parameters] ], click [OK] in the pop-up dialog box.

After completing the above settings, drag the point O on the line segment to see the effect. The color of the line segment is constantly changing, as shown in the picture.

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