#include <ncurses.h>
#include <math.h>

#define AMPLITUDE 10
#define WAVELENGTH 40
#define SPEED 0.1

int main(void) {
  // Initialize ncurses and set up the screen
  initscr();
  noecho();
  curs_set(FALSE);

  // Get the dimensions of the terminal window
  int row, col;
  getmaxyx(stdscr, row, col);

  // Set up the sine wave variables
  double t = 0;
  double y = 0;

  // Loop forever, updating and redrawing the sine wave
  while (1) {
    // Clear the screen
    clear();

    // Calculate the y-value of the sine wave at each point along the x-axis
    for (int x = 0; x < col; x++) {
      y = AMPLITUDE * sin((2 * M_PI * x) / WAVELENGTH - t);
      mvprintw(row / 2 + y, x, "*");
    }

    // Update the time variable and redraw the screen
    t += SPEED;
    refresh();

    // Sleep for a short time to slow down the animation
    usleep(10000);
  }

  // Clean up ncursed
  endwin();
  return 0;
}