WEBVTT 00:00.210 --> 00:03.420 It's time for a new activity in this activity. 00:03.510 --> 00:11.540 We practice we've the with the P.W. function and also with the programming concepts you have seen before, 00:12.000 --> 00:21.780 the open a new project here and your challenge will be to make the LSD fade in and fade out, just as 00:21.780 --> 00:23.460 you can see on the video right now. 00:25.860 --> 00:27.100 So how to do this? 00:27.120 --> 00:33.750 I'm going to give you a few hints, OK, and then the solution in the next video, you will need to 00:33.750 --> 00:41.310 initialize the inequity before we speed mode, etc., and then to make the LCD fade and fade out, you 00:41.310 --> 00:44.510 will actually write code in the loop, OK? 00:44.820 --> 00:48.910 And you will need to use to for looks. 00:49.290 --> 00:51.420 OK, so I'll look here. 00:52.650 --> 00:55.470 To go from zero to 200. 00:57.830 --> 00:59.930 55 and another for. 01:01.560 --> 01:10.170 To go from 255 to zero, the why is that, because the great function can take a value between zero 01:10.170 --> 01:11.920 and two hundred fifty five. 01:12.130 --> 01:19.810 OK, zero means boiled off and 255 means up with the maximum intensity. 01:20.130 --> 01:24.630 So you need to go from zero all the way up to 255. 01:24.840 --> 01:29.070 And then once you reach this number, you need to go back to zero. 01:29.400 --> 01:33.740 OK, step by step, number by number and every time you will. 01:34.020 --> 01:37.100 But this number into the the right function. 01:37.130 --> 01:42.390 So you will have another right with zero and then with one, with two with three, etc.. 01:42.930 --> 01:49.000 But as you can guess, you are not going to write the great function 500 times, OK. 01:49.440 --> 01:51.630 Instead you are going to use four loops. 01:51.990 --> 01:59.100 So you have already seen how to use a fluke to go from number to another number by incrementing the 01:59.100 --> 02:00.950 index every time we have I. 02:01.410 --> 02:06.950 Lesperance so that that you know, but actually it's not the only way to write for the can. 02:06.990 --> 02:07.140 Right. 02:07.140 --> 02:10.470 To follow up to actually decrease the index. 02:10.780 --> 02:16.050 OK, I'm just going to give you the structure for that so you have your full loop. 02:16.840 --> 02:23.980 And then you start the index instead of starting at zero, you will start at two hundred and fifty five 02:24.520 --> 02:26.290 a semicolon. 02:26.650 --> 02:34.810 And then the condition so that the loop can continue is simply that the index is greater or equal. 02:36.590 --> 02:37.770 Then zero. 02:38.630 --> 02:47.540 And finally, what we're going to do with the index is not a plus plus, but I minus minus eight plus 02:47.540 --> 02:52.930 plus means you add one to a A minus, minus means you decrease. 02:53.240 --> 02:54.330 I buy one. 02:54.650 --> 03:00.740 So we start 255 and then 250 points at zero all the way down to zero and then stop. 03:01.160 --> 03:01.490 All right. 03:01.500 --> 03:07.540 So we've not you should have enough information to injectivity and also what you're going to need. 03:07.550 --> 03:12.020 The last thing is to add a small delay, OK, between each analagous. 03:12.020 --> 03:17.750 Right that you do, because if you do it at full speed, it will be way too quick for you to see anything. 03:18.380 --> 03:28.460 So you can add a delay of five milliseconds, OK, between each iteration of the folk, you can add 03:28.460 --> 03:30.020 a five minute delay. 03:30.320 --> 03:34.810 This is the value that I used in the video that I showed you about the result. 03:35.180 --> 03:37.100 Now, of course, you can tinker this value. 03:37.100 --> 03:41.440 If you want to increase or decrease it, it's up to you. 03:41.720 --> 03:47.330 And now, well, it's you turn practice and I will see you in the next video for the solution.