A matrix being rastered by a number

matrix.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define CLEAR_INPUT while (getchar () != '\n') /*void*/
#define CLEAR_SCREEN printf ("\x1b[3;J\x1b[H\x1b[2J")

int* create_matrix(int h, int w){
    int* tmp_mtx = NULL;

    if ((tmp_mtx = calloc (sizeof(int), h * w)) == NULL){
        printf ("Memory Error!\n");
        exit (-1);
    }  

    return tmp_mtx;
}

void rotate_value (int* mtrx, int h, int w, int* x, int* y){    
    mtrx[*x + (*y) * w] = 0;
    
    (*x)++;

    if ( (*x == w) && (*y == (h - 1)) ){
        *x = 0, *y = 0;
    } else {
        if (*x == w)
            (*y)++, *x = 0;
    }

    mtrx[*x + (*y) * w] = 8;
}

void print_matrix (int* mtrx, const int h, const int w){
    for (int i = 0; i < h; i++){
        for (int j = 0; j < w; j++)
            printf("[%d] ", mtrx [j + i * w]);
        putchar ('\n');
    }
    putchar ('\n');
}

void matrix_animation (int* mtrx, int h, int w, int* x, int* y){
    for (int i = 0; i < h; i++){
        for (int j = 0; j < w; j++){
            print_matrix (mtrx, h, w);
            rotate_value (mtrx, h, w, x, y);
            getchar ();
            printf ("\x1b[3;J\x1b[H\x1b[2J");
        }
    }
}

int main (int argc, char** argv){
    int* matrix = NULL;
    int x, y, h, w;
    int check = 0;

    CLEAR_SCREEN;
    printf ("Matrix Width:\n");
    do {
        check = scanf("%d", &w);
        CLEAR_INPUT;
        if (check != 1)
            printf ("Value not read! Try again:\n");
    } while (check != 1);

    printf ("Matrix Height:\n");
    do {
        check = scanf("%d", &h);
        CLEAR_INPUT;
        if (check != 1)
            printf ("Value not read! Try again:\n");
    } while (check != 1);

    printf ("Enter starting point: <col><space><line>:\n");
    while (check != 2 || x >= w || y >= h){
        check = scanf("%d %d", &x, &y);
        CLEAR_INPUT;
        if (check != 2)
            printf ("2 values required for columns and lines! Try again:\n");
        if (x >= w || y >= h)
            printf ("Starting point coordinates are out of bounds! Try again:\n");
    }

    matrix = create_matrix (h, w);

    matrix[x + y * w] = 8;
    CLEAR_SCREEN;
    matrix_animation (matrix, h, w, &x, &y);

    free (matrix);

    return 0;
}