This Python script generates a gradient-like block of colored characters...
September 3, 2025 at 09:50 PM
This Python script generates a gradient-like block of colored characters using ASCII escape sequences to represent RGB values in the terminal.
Here's what the code does:
-
Iterate through a loop:
for i in range(0, 255, 3)
: This creates a loop wherei
starts at 0 and increments by 3 until it reaches 255 (or close).
-
Calculate the colors for background and text:
b = 255 - i
: This calculates the background color intensity (decreasing from white to black asi
increases).c = i
: This calculates the foreground text color intensity (increasing from black to white asi
increases).
-
Print colored blocks using ANSI Escape Codes:
- The code uses ANSI escape sequences for applying colors in the terminal. Specifically:
\033[48;2;{b};{b};{b}m
: This sets the background RGB color to(b, b, b)
.\033[38;2;{c};{c};{c}m
: This sets the foreground (text) RGB color to(c, c, c)
.▄
: This is the Unicode character block "▄" (lower half block), which gets printed in the specified colors.\033[0m
: This resets the terminal format to default, ensuring the color settings don't persist.
- The code uses ANSI escape sequences for applying colors in the terminal. Specifically:
-
Print output continuously on the same line:
end=""
: Theprint
function appends the block without starting a new line, resulting in all the blocks being printed on the same horizontal line.
-
Add a final newline:
- The last
print("")
ensures that the terminal moves to the next line after displaying the gradient of colored blocks.
- The last
Visual Effect:
When you run this code in a terminal that supports 24-bit RGB color and Unicode, it will produce a horizontal gradient of "▄" characters. The gradient will transition smoothly:
- The background color starts at white and gradually becomes black.
- The foreground text color starts at black and gradually becomes white.
The result is a smooth grayscale gradient using both background and foreground shades.
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