init

blocks.py

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+#!/usr/bin/env python3
+
+import cairo
+import math
+from utils import random_color
+
+WIDTH, HEIGHT = 256, 256
+BLOCKS = 5
+
+def main():
+    
+    surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, WIDTH, HEIGHT)
+    ctx = cairo.Context(surface)
+
+    ctx.scale(WIDTH, HEIGHT)  # Normalizing the canvas
+
+    block_height = 1/BLOCKS
+    
+    for num in range(BLOCKS):
+        r, g, b = random_color()
+        ctx.rectangle(0, num*block_height, 1, (num+1)*block_height)
+        ctx.set_source_rgb(r, g, b)
+        ctx.fill()
+
+    surface.write_to_png("out/blocks.png")  # Output to PNG
+
+if __name__ == '__main__':
+    main()

gradient.py

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+#!/usr/bin/env python3
+
+import cairo
+import math
+from utils import random_color
+
+WIDTH, HEIGHT = 256, 256
+
+def main():
+    
+    surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, WIDTH, HEIGHT)
+    ctx = cairo.Context(surface)
+
+    ctx.scale(WIDTH, HEIGHT)  # Normalizing the canvas
+
+    pat = cairo.LinearGradient(0.0, 0.0, 0.0, 1.0)
+    r1, g1, b1 = random_color()
+    r2, g2, b2 = random_color()
+    pat.add_color_stop_rgba(1, r1, g1, b1, 1)  # First stop, 50% opacity
+    pat.add_color_stop_rgba(0, r2, g2, b2, 1)  # Last stop, 100% opacity
+
+    ctx.rectangle(0, 0, 1, 1)  # Rectangle(x0, y0, x1, y1)
+    ctx.set_source(pat)
+    ctx.fill()
+
+
+    surface.write_to_png("out/gradient.png")  # Output to PNG
+
+if __name__ == '__main__':
+    main()

utils.py

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+#!/usr/bin/env python3
+import random
+
+def random_color():
+    red = random.uniform(0, 1)
+    green = random.uniform(0, 1)
+    blue = random.uniform(0, 1)
+    return red, green, blue

waves.py

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+#!/usr/bin/env python3
+
+import cairo
+import math
+from utils import random_color
+
+WIDTH, HEIGHT = 256, 256
+WAVES = 8
+
+
+def main():
+    
+    surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, WIDTH, HEIGHT)
+    ctx = cairo.Context(surface)
+
+    ctx.scale(WIDTH, HEIGHT)  # Normalizing the canvas
+
+    wave_height = 1/WAVES
+    
+    for num in range(WAVES):
+        r, g, b = random_color()
+        points = []
+        x = 0
+        while x < 1:
+            y = math.sin(x*50) * 0.1
+            points.append((x, ( (y/4) + ((0.5+num)*wave_height))))
+            x += 0.001
+        print(points)
+        ctx.move_to(*points[0])
+        for p in points[1:]:
+            ctx.line_to(*p)
+        ctx.set_line_width(0.002)
+        ctx.set_source_rgb(r, g, b)
+        ctx.stroke()
+
+    surface.write_to_png("out/waves.png")  # Output to PNG
+
+if __name__ == '__main__':
+    main()