From cf982a11563429228070ce9b0f81a2fb0a066666 Mon Sep 17 00:00:00 2001
From: Scott <windsor@tilde.club>
Date: Sun, 13 Jul 2025 18:16:12 +0000
Subject: [PATCH] Initial Commit. My first commit on Tilde.club!

---
 .gitignore | 15 ++++++++++
 README.md  | 13 +++++++++
 dna.py     | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 113 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 dna.py

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..39cefb3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,15 @@
+.env
+*.pyc
+*.swp
+/bin
+/Include
+/include
+/lib
+/lib64
+/Lib
+/Scripts
+pyvenv.cfg
+/build
+/dist
+*.egg-info⏎     
+
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..1a26910
--- /dev/null
+++ b/README.md
@@ -0,0 +1,13 @@
+#Clever Heading Goes Here.
+
+This is just a Python script that makes an ascii art DNA strand. It took me way too long to make for what it is, but it was fun.
+
+Use the `-h` flag to show command line args. I recommend the `-b` flag to use blocks intead of letters, It loooks pretty cool I think.
+
+When I signed up for tilde.club, the starting message says "Make a disaster, be a disaster!" And somewhere on Mastodon I saw a meme that says "BUILD SILLY THINGS!"
+
+So that's what I did. And that's what I'll continue to do, when I'm not outsiding. But it's too dang hot this weekend. So, ASCII art.
+
+###Does this really need a license?
+
+Just consider it MIT I guess if you really need one.
diff --git a/dna.py b/dna.py
new file mode 100644
index 0000000..524c0c3
--- /dev/null
+++ b/dna.py
@@ -0,0 +1,85 @@
+from math import sin, cos, pi
+from colorama import Fore,Back,Style
+from time import sleep
+from random import randint
+import argparse
+
+#command line arg stuff
+desc="Displays an ASCII art strand of DNA, because why not?"
+epi="""Protip: to watch an animated strand of ASCII DNA scroll across the screen,
+set length to a really large number and pause to a reasonable number like 50 
+or 100 milliseconds. Enjoy!"""
+parser=argparse.ArgumentParser(description=desc, epilog=epi)
+parser.add_argument("-l", "--length", type=int, help="Changes the length of the ASCII DNA. Default = 40")
+parser.add_argument("-p", "--pause", type=int, help="Number of milliseconds to pause after plotting each line. Default=0")
+parser.add_argument("-b", "--block", action="store_true", help="Display useing block characters instead of letters. Default=False")
+args=parser.parse_args()
+
+if args.length: length=args.length
+else: length=40
+
+if args.pause: pause=args.pause
+else: pause=0
+
+if args.block:
+    chars={"x":"█","a":"█","t":"█","g":"█","c":"█"}
+else:
+    chars={"x":"X","a":"A","t":"T","g":"G","c":"C"}
+
+#define and initialize stuff
+class DnaStrand:
+    def __init__(self, char, func):
+        self.char=char
+        self.func=func
+    def pos(self,x):
+        return int(self.func(x))
+    def getchar(self): return self.char
+
+width = 20
+blank=[]
+lin=[]
+theta=0
+basecount=2
+step=pi/12
+
+bluchar=Fore.BLUE+chars["x"]+Fore.WHITE
+blustrand=DnaStrand(bluchar, lambda x: (width/2-1)*(sin(x)+1))
+redchar=Fore.RED+chars["x"]+Fore.WHITE
+redstrand=DnaStrand(redchar, lambda x: (width/2-1)*(cos(x)+1))
+
+a=Fore.YELLOW+chars["a"]+Fore.WHITE
+t=Fore.WHITE+chars["t"]+Fore.WHITE
+g=Fore.GREEN+chars["g"]+Fore.WHITE
+c=Fore.CYAN+chars["c"]+Fore.WHITE
+msg="tilde.club"
+for i in range (width):
+    blank.append(" ")
+  
+
+#Draw
+for i in range(length):
+    lin=blank.copy()
+    blupos=blustrand.pos(theta)
+    redpos=redstrand.pos(theta)
+    lin[blupos]=blustrand.getchar()
+    lin[redpos]=redstrand.getchar()
+
+    if basecount%3==0 and abs(blupos-redpos) > 3:
+        bp=randint(1,4)
+        if bp==1:bp1,bp2=a,t
+        elif bp==2:bp1,bp2=t,a
+        elif bp==3:bp1,bp2=g,c
+        else:bp1,bp2=c,g
+        halfway=int(abs(blupos+redpos)/2)
+        start=min(redpos,blupos)+1
+        end=max(redpos,blupos)
+        lin[start:halfway]=[bp1]*abs(halfway-start)
+        lin[halfway:end]=[bp2]*abs(end-halfway)
+        tc=randint(1,5)
+        if tc==5 and end-start > len (msg):
+            lin[start:start+len(msg)]=list(msg)
+
+    print("".join(lin))
+    theta += step
+    basecount+=1
+    sleep(pause/1000)