From b20e5d9489356e98a48489bd7440d1dc3d2c5e24 Mon Sep 17 00:00:00 2001
From: Daniel Barber <github@danbarber.me>
Date: Sun, 30 May 2021 18:07:05 -0400
Subject: [PATCH] Add tunnel effect

---
 tunnel.py | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 tunnel.py

diff --git a/tunnel.py b/tunnel.py
new file mode 100644
index 0000000..3b196f2
--- /dev/null
+++ b/tunnel.py
@@ -0,0 +1,62 @@
+from random import randint
+import unicornhathd as unicorn
+import math
+from time import sleep
+
+unicorn.brightness(1)
+unicorn.rotation(0)
+
+height = 16
+width = 16
+
+half_height = 8 
+half_width = 8
+
+palette = [
+    (0x1a, 0x1c, 0x2c),
+    (0x5d, 0x27, 0x5d),
+    (0xb1, 0x3e, 0x53),
+    (0xef, 0x7d, 0x57),
+    (0xff, 0xcd, 0x75),
+    (0xa7, 0xf0, 0x70),
+    (0x38, 0xb7, 0x64),
+    (0x25, 0x71, 0x79),
+    (0x29, 0x36, 0x6f),
+    (0x3b, 0x5d, 0xc9),
+    (0x41, 0xa6, 0xf6),
+    (0x73, 0xef, 0xf7),
+    (0xf4, 0xf4, 0xf4),
+    (0x94, 0xb0, 0xc2),
+    (0x56, 0x6c, 0x86),
+    (0x33, 0x3c, 0x57)
+];
+
+
+t = 0
+
+try:
+    while True:
+        t += 0.25
+
+        for y in range(-half_height - 1, half_height - 1):
+            for x in range(-half_width, 0):
+                z = 20/math.sqrt(x*x + y*y) + t
+                q = z - (z%21) + 15 if (z%21) < 15 else z
+                w = 9/y + t if y != 0 else t 
+
+                if y > 0 and w < q:
+                    c = (14 if pow(x*(q - t), 2) < 39 else 6) + w%2
+                else:
+                    if -y*(q - t) < 99/(pow(x*(q - t)/50, 2) + 1):
+                        c = z%2 if q == z else 3
+                    else:
+                        c = 9 - y/3 - ((0x2 >> (-y%3)) & 1)
+
+                unicorn.set_pixel(x, y, *palette[int(c)])
+
+        unicorn.show()
+        sleep(0.025)
+
+
+except KeyboardInterrupt:
+    unicorn.off()