let fieldId = 0;
for(let i = 0; i < 64; i++){
    fieldId = i.toString();
    document.getElementById("field"+fieldId).selected = 0;
}
function selectField(field){
    console.log(field.id);
    if(field.selected === 0) {
        field.style.backgroundColor = "rgb(227,8,8, 0.3)";
        field.selected = 1;
    } else if (field.selected === 1){
        field.style.backgroundColor = "rgb(255,255,255, 1)";
        field.selected = 0;
    }
}