Square Wave Pattern

# *Square Wave Pattern* by @CodingComputing

# Parameters
num_cycles = 3  # How many repeating cycles are present?
high_width = 2  # How long is the wave high in each cycle?
low_before_width = 1  # Before the wave moves up to high, how long is it low?
low_after_width = 1  # After the wave moves down from high, how long is it low?
height = 4  # How high does the wave go?

# Develop Column-wise representation
# L for Low, H for High, T for Transition
single_cycle_col_repr = 'L'*low_before_width + 'T' + 'H'*high_width + 'T' + 'L'*low_after_width
full_col_repr = single_cycle_col_repr * num_cycles

# Form each row and draw!
for row_idx in range(height):
    if row_idx == 0:  # Top row. '*' comes for H or T type columns
        row_items = [(' ' if c=='L' else '*') for c in full_col_repr]
    elif row_idx == height-1:  # Bottom row. '*' comes for L or T type columns
        row_items = [(' ' if c=='H' else '*') for c in full_col_repr]
    else:  # Middle row. '*' comes only T type columns
        row_items = [('*' if c=='T' else ' ') for c in full_col_repr]
    print(''.join(row_items))  # Output the row

# Output:
#  ****  ****  ****
#  *  *  *  *  *  *
#  *  *  *  *  *  *
# **  ****  ****  **