WEBVTT 0 00:00.390 --> 00:03.480 All right. Onwards to the next turtle challenge. 1 00:03.990 --> 00:06.960 So this one is going to be a little bit more intensive, 2 00:06.990 --> 00:08.880 but still a bit of a warmup. 3 00:08.910 --> 00:13.910 So we're just going to go for a light jog and we're going to draw a dashed line. 4 00:15.150 --> 00:18.720 You're going to get your turtle to draw a line like this 5 00:19.050 --> 00:24.000 where it's going to draw a line for 10 paces and then a gap of 10 paces, 6 00:24.360 --> 00:26.400 and then a solid line for 10 paces again 7 00:26.400 --> 00:30.150 and it's going to repeat this until it does this 50 times. 8 00:30.720 --> 00:33.270 The actual length of the line doesn't really matter, 9 00:33.630 --> 00:37.260 the actual length of each of the sections doesn't really matter. 10 00:37.260 --> 00:41.580 What's really important is you're able to get this alternating draw- 11 00:41.580 --> 00:44.850 no-draw thing going on. To complete this challenge 12 00:44.880 --> 00:49.880 you're going to need to look through the documentation and maybe also use the 13 00:50.760 --> 00:55.230 help of Google or Stack Overflow and figure out how you can get this behavior to 14 00:55.230 --> 01:00.090 happen. Have a think about it and pause the video and complete the challenge. 15 01:03.000 --> 01:06.330 All right. So if we look through the table of contents here, 16 01:06.720 --> 01:11.550 we can see that the thing that controls the pen is in this section. 17 01:11.670 --> 01:15.660 We can control it's drawing, color, filling and more. 18 01:16.080 --> 01:18.960 Now if we look at the drawing control you can see 19 01:18.960 --> 01:23.790 we can get it to pen down and pen up. When we pull the pen down, 20 01:23.970 --> 01:27.450 that means the pen is on the paper and it's going to make a mark. 21 01:27.840 --> 01:32.370 But when the pen is pulled up, then there's going to be no drawing happening 22 01:32.610 --> 01:34.740 when our turtle is moving. 23 01:35.700 --> 01:39.270 That means we can write some sort of loop, right? 24 01:39.270 --> 01:44.070 Where we get our turtle to move forwards by 10 paces 25 01:44.640 --> 01:48.720 and then we can get this to pull the pen up. 26 01:49.620 --> 01:54.300 And what this is going to do is allow us to move forwards without drawing. 27 01:54.720 --> 01:59.220 So now, while the pen is held up we're going to go forwards. Once more 28 01:59.310 --> 02:03.420 another 10 paces this is going to draw the blank. And then finally, 29 02:03.420 --> 02:06.000 we're gonna go ahead and put the pen down again. 30 02:07.890 --> 02:12.890 So now, all we need is for these four steps to repeat 15 times so we can write a 31 02:15.780 --> 02:20.280 for loop and then create a range that goes from 0 to 15. 32 02:20.730 --> 02:25.730 And then once we indent this block inside the for loop and run our code, 33 02:26.430 --> 02:29.340 then you can see it draw our dashed line. 34 02:30.030 --> 02:31.620 Did you manage to get this solution? 35 02:31.980 --> 02:36.420 Did you manage to find the relevant part of the documentation to be able to pull 36 02:36.420 --> 02:41.420 the pen up and put the pen down, or did you simply change your code so that it 37 02:41.790 --> 02:45.840 drew black and then it drew white? All of these solutions would work, 38 02:45.930 --> 02:50.930 but what I really wanted you to do is to dig through the documentation and find 39 02:51.540 --> 02:54.360 the parts which will help you to achieve your goals. 40 02:55.710 --> 02:57.000 Head over to the next lesson 41 02:57.120 --> 03:00.180 and I've got another slightly harder challenge for you.