# blink symbols. ### Challenge 0 You have successfully following the [blink tutorial](/hcwxud). If not, then let's start the tutorial now. Your @boardname@ script should start by displaying a blinking script on screen. We want to plot the x and y coordinates to 2, 2. Additionally, you will pause by 100 milliseconds then clear the screen of the @boardname@. Let's give it a go! ``` while (true) { led.plot(2, 2) basic.pause(200) basic.clearScreen() basic.pause(200) } ``` ### Challenge 1 Make a `>` greater than symbol. Start in the upper left corner of the simulator when you plot coordinates. Make sure to add the line of code `led->plot (0,0)` under the last line of code ``` while (true) { led1.plot(2, 2) basic1.pause(200) basic1.clearScreen() basic1.pause(200) led1.plot(0, 0) // *** } ``` Design the top half of the `>` symbol by connecting a LED to the original center coordinate `2,2` and the upper left coordinate `0,0` Make sure to add the line of code `led->plot (1,1)` under the last line of code ``` while (true) { led2.plot(2, 2) basic2.pause(200) basic2.clearScreen() basic2.pause(200) led2.plot(0, 0) led2.plot(1, 1) // *** } ``` Awesome! You have designed half of the `>` symbol. Now we should finish the lower half of the `>` symbol * tap the `run` button to view the updated script on the simulator Add the bottom half of the `>` symbol by plotting the most bottom - left LED first. Make sure to add the line of code `led->plot (0,5)` ``` while (true) { led3.plot(2, 2) basic3.pause(200) basic3.clearScreen() basic3.pause(200) led3.plot(0, 0) led3.plot(1, 1) led3.plot(0, 4) // *** } ``` Awesome! Now we must connect a LED to the original center coordinate `2,2` and the lower left coordinate `0,5` Make sure to add the line of code `led->plot (1,4)` Your `main` function should look like this: ``` while (true) { led4.plot(2, 2) basic4.pause(200) basic4.clearScreen() basic4.pause(200) led4.plot(0, 0) led4.plot(1, 1) led4.plot(0, 4) led4.plot(1, 3) // *** } ``` * `run` the script and see that the program works as expected Congratulations! You made a `>` symbol. ### Challenge 2 Use `led->plot` to create a exclamation design `!` Your `main` function should look like this. (notice the notation of `...` represents previous code in **Challenge 0** and **Challenge 1** Make sure to add these lines of code within the `while` loop Your `main` function should look like this: ``` while (true) { // ... led5.plot(4, 0) // *** led5.plot(4, 1) // *** led5.plot(4, 2) // *** led5.plot(4, 4) // *** } ``` * run the code and see that it works as expected. ### Challenge 3 Use the same logic `led->plot` to turn on all the LED lights!!! * run the code and see that it works as expected