Challenge [C90 Version] -TizzyT

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <time.h>
int Randomize(int, int, bool*);
int main() {
    srand(time(NULL));
    int X, Y, moves = 0, PosX = 0, PosY = 0, Max = 0;
    printf("Enter width of array\n");
    scanf("%d", &X);
    printf("Enter height of array\n");
    scanf("%d", &Y);
    printf("\n");
    int board[Y][X];
    int i = 0;
    int y = 0;
    int x = 0;
    for(y; y < Y; y++) {
        x = 0;
        for (x; x < X; x++) {
            board[y][x] = 0;
        }
    }
    while (true) {
        moves++;
        board[PosY][PosX]++;
        if (board[PosY][PosX] > Max) Max = board[PosY][PosX];
        bool done = true;
        y = 0;
        x = 0;
        for(y; y < Y; y++) {
            x = 0;
            for (x; x < X; x++) {
                printf("%d ", board[y][x]);
                if (board[y][x] == 0) done = false;
            }
            printf("\n");
        }
        printf("X:%d Y:%d\n\n", PosY, PosX);
        if (done) break;
        bool Moved = false;
        while (Moved == false) {
            PosX = Randomize(X, PosX, &Moved);
            PosY = Randomize(Y, PosY, &Moved);
        }
    }
    printf("Number of moves: %d\n\n", moves);
    int Histogram[Max + 1];
    i = 0;
    for (i; i <= Max; i++) { Histogram[i] = 0; }
    y = 0;
    x = 0;
    for(y; y < Y; y++) {
        x = 0;
        for (x; x < X; x++) {
            Histogram[board[y][x]]++;
        }
    }
    i = 0;
    for (i; i <= Max; i++){
        if (Histogram[i] > 0) { printf("%d\t%d\n", i, Histogram[i]); }
    }
    return 0;
}
int Randomize(int Limit, int Value, bool* Moved) {
    if (Value == 0) {
        if (rand() % 2 == 1) {
            Value++;
            *Moved = true;
        }
    } else if (Value == Limit - 1) {
        if (rand() % 2 == 1) {
            Value--;
            *Moved = true;
        }
    } else {
        switch (rand() % 3) {
            case 1:
                Value--;
                *Moved = true;
                break;
            case 2:
                Value++;
                *Moved = true;
                break;
        }
    }
    return Value;
}