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March 21, 2019 02:57
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| float x, y; | |
| float w, h; | |
| float speed = 5; | |
| int state = 0; | |
| void setup() { | |
| size(500, 500); | |
| w = 50; | |
| h = 30; | |
| x = w/2; | |
| y = h/2; | |
| } | |
| void draw() { | |
| // If the state is 0, move to the right. | |
| switch (state){ | |
| case 0: | |
| x += speed; | |
| // If, while the state is 0, it reaches the right side of the window, change the state to 1 | |
| if (x > width-w/2) { | |
| x = width-w/2; | |
| state = 1; | |
| } | |
| break; | |
| case 1: | |
| y += speed; | |
| if (y > height-h/2) { | |
| y = height-h/2; | |
| state = 2; | |
| } | |
| break; | |
| case 2: | |
| x -= speed; | |
| if (x < w/2) { | |
| x = w/2; | |
| state = 3; | |
| } | |
| break; | |
| case 3: | |
| y -= speed; | |
| if (y < h/2) { | |
| y = h/2; | |
| state=0; | |
| } | |
| break; | |
| } | |
| background(0); | |
| // UFO | |
| fill(151,37,210); | |
| ellipse(x, y, 50, 15); | |
| fill(186,0,255); | |
| stroke(255); | |
| arc(x, y, 25, 25, PI, TWO_PI); | |
| } |
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