67153fccc5
* Reduce the use of @boardname@ * Use literal 'EV3 Brick' string instead * Use the new 'nickname' form
63 lines
2.5 KiB
Markdown
63 lines
2.5 KiB
Markdown
# Red Light, Green Light
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## Introduction @fullscreen
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Use the ``||sensors:pause color sensor||`` block to play Red Light, Green Light with your @boardname@ robot!
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## Step 1
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Open the ``||sensors:Sensors||`` Toolbox drawer. Drag out **2** ``||sensors:pause color sensor||`` blocks onto the Workspace, and drop them into the ``||loops:forever||`` loop.
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```blocks
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forever(function () {
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sensors.color3.pauseUntilColorDetected(ColorSensorColor.Blue)
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sensors.color3.pauseUntilColorDetected(ColorSensorColor.Blue)
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})
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```
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## Step 2
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In the first ``||sensors:pause color sensor||`` block, use the second drop-down menu to select the "Green" color. In the second ``||sensors:pause color sensor||`` block, use the second drop-down menu to select the "Red" color.
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```blocks
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forever(function () {
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sensors.color3.pauseUntilColorDetected(ColorSensorColor.Green)
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sensors.color3.pauseUntilColorDetected(ColorSensorColor.Red)
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})
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```
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## Step 3
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Open the ``||motors:Motors||`` Toolbox drawer. Drag out a ``||motors:tank large motors||`` block onto the Workspace, and drop in between the ``||sensors:pause color sensor||`` blocks.
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```blocks
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forever(function () {
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sensors.color3.pauseUntilColorDetected(ColorSensorColor.Green)
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motors.largeBC.tank(50, 50)
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sensors.color3.pauseUntilColorDetected(ColorSensorColor.Red)
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})
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```
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## Step 4
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Open the ``||motors:Motors||`` Toolbox drawer. Drag out a ``||motors:stop all motors||`` block onto the Workspace, and drop it in after the second ``||sensors:pause color sensor||`` block in the ``||loops:forever||`` loop.
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```blocks
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forever(function () {
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sensors.color3.pauseUntilColorDetected(ColorSensorColor.Green)
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motors.largeBC.tank(50, 50)
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sensors.color3.pauseUntilColorDetected(ColorSensorColor.Red)
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motors.stopAll()
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})
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```
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## Step 5
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Now, plug your EV3 Brick into the computer with the USB cable, and click the **Download** button at the bottom of your screen. Follow the directions to save your program to the brick.
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Attach a Color Sensor to Port 3 of your brick, and attach your brick to a driving base with large motors attached to Ports B and C. See the building instructions for: _Driving Base with Color Sensor Forward_. Test your program by putting a green or red piece of paper or LEGO brick in front of the color sensor.
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